20987150860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^2\times {\mathrm{373}}^1$

素因数の和:612

約数の個数: 144

約数和(自身を含む): 50176881216

約数和(自身を除く): 29189730356

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 65, 92, 97, 115, 130, 194, 230, 260, 299, 373, 388, 460, 485, 598, 746, 970, 1196, 1261, 1492, 1495, 1865, 1940, 2231, 2522, 2990, 3730, 4462, 4849, 5044, 5980, 6305, 7460, 8579, 8924, 9409, 9698, 11155, 12610, 17158, 18818, 19396, 22310, 24245, 25220, 29003, 34316, 36181, 37636, 42895, 44620, 47045, 48490, 58006, 72362, 85790, 94090, 96980, 111527, 116012, 122317, 144724, 145015, 171580, 180905, 188180, 216407, 223054, 244634, 290030, 361810, 432814, 446108, 470353, 489268, 557635, 580060, 611585, 723620, 832163, 865628, 940706, 1082035, 1115270, 1223170, 1664326, 1881412, 2164070, 2230540, 2351765, 2446340, 2813291, 3328652, 3509557, 4160815, 4328140, 4703530, 5626582, 7019114, 8321630, 9407060, 10818119, 11253164, 14038228, 14066455, 16643260, 17547785, 21636238, 28132910, 35095570, 43272476, 45624241, 54090595, 56265820, 70191140, 80719811, 91248482, 108181190, 161439622, 182496964, 216362380, 228121205, 322879244, 403599055, 456242410, 807198110, 912484820, 1049357543, 1614396220, 2098715086, 4197430172, 5246787715, 10493575430, 20987150860]

約数ペア:

[(1, 20987150860), (2, 10493575430), (4, 5246787715), (5, 4197430172), (10, 2098715086), (13, 1614396220), (20, 1049357543), (23, 912484820), (26, 807198110), (46, 456242410), (52, 403599055), (65, 322879244), (92, 228121205), (97, 216362380), (115, 182496964), (130, 161439622), (194, 108181190), (230, 91248482), (260, 80719811), (299, 70191140), (373, 56265820), (388, 54090595), (460, 45624241), (485, 43272476), (598, 35095570), (746, 28132910), (970, 21636238), (1196, 17547785), (1261, 16643260), (1492, 14066455), (1495, 14038228), (1865, 11253164), (1940, 10818119), (2231, 9407060), (2522, 8321630), (2990, 7019114), (3730, 5626582), (4462, 4703530), (4849, 4328140), (5044, 4160815), (5980, 3509557), (6305, 3328652), (7460, 2813291), (8579, 2446340), (8924, 2351765), (9409, 2230540), (9698, 2164070), (11155, 1881412), (12610, 1664326), (17158, 1223170), (18818, 1115270), (19396, 1082035), (22310, 940706), (24245, 865628), (25220, 832163), (29003, 723620), (34316, 611585), (36181, 580060), (37636, 557635), (42895, 489268), (44620, 470353), (47045, 446108), (48490, 432814), (58006, 361810), (72362, 290030), (85790, 244634), (94090, 223054), (96980, 216407), (111527, 188180), (116012, 180905), (122317, 171580), (144724, 145015)]