21168618580

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{8527}}^1$

素因数の和:8741

約数の個数: 96

約数和(自身を含む): 48138854400

約数和(自身を除く): 26970235820

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 47, 76, 94, 95, 139, 188, 190, 235, 278, 380, 470, 556, 695, 893, 940, 1390, 1786, 2641, 2780, 3572, 4465, 5282, 6533, 8527, 8930, 10564, 13066, 13205, 17054, 17860, 26132, 26410, 32665, 34108, 42635, 52820, 65330, 85270, 124127, 130660, 162013, 170540, 248254, 324026, 400769, 496508, 620635, 648052, 801538, 810065, 1185253, 1241270, 1603076, 1620130, 2003845, 2370506, 2482540, 3240260, 4007690, 4741012, 5926265, 7614611, 8015380, 11852530, 15229222, 22519807, 23705060, 30458444, 38073055, 45039614, 55706891, 76146110, 90079228, 111413782, 112599035, 152292220, 222827564, 225198070, 278534455, 450396140, 557068910, 1058430929, 1114137820, 2116861858, 4233723716, 5292154645, 10584309290, 21168618580]

約数ペア:

[(1, 21168618580), (2, 10584309290), (4, 5292154645), (5, 4233723716), (10, 2116861858), (19, 1114137820), (20, 1058430929), (38, 557068910), (47, 450396140), (76, 278534455), (94, 225198070), (95, 222827564), (139, 152292220), (188, 112599035), (190, 111413782), (235, 90079228), (278, 76146110), (380, 55706891), (470, 45039614), (556, 38073055), (695, 30458444), (893, 23705060), (940, 22519807), (1390, 15229222), (1786, 11852530), (2641, 8015380), (2780, 7614611), (3572, 5926265), (4465, 4741012), (5282, 4007690), (6533, 3240260), (8527, 2482540), (8930, 2370506), (10564, 2003845), (13066, 1620130), (13205, 1603076), (17054, 1241270), (17860, 1185253), (26132, 810065), (26410, 801538), (32665, 648052), (34108, 620635), (42635, 496508), (52820, 400769), (65330, 324026), (85270, 248254), (124127, 170540), (130660, 162013)]