20783720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:123

約数の個数: 128

約数和(自身を含む): 54432000

約数和(自身を除く): 33648280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 23, 29, 38, 40, 41, 46, 58, 76, 82, 92, 95, 115, 116, 145, 152, 164, 184, 190, 205, 230, 232, 290, 328, 380, 410, 437, 460, 551, 580, 667, 760, 779, 820, 874, 920, 943, 1102, 1160, 1189, 1334, 1558, 1640, 1748, 1886, 2185, 2204, 2378, 2668, 2755, 3116, 3335, 3496, 3772, 3895, 4370, 4408, 4715, 4756, 5336, 5510, 5945, 6232, 6670, 7544, 7790, 8740, 9430, 9512, 11020, 11890, 12673, 13340, 15580, 17480, 17917, 18860, 22040, 22591, 23780, 25346, 26680, 27347, 31160, 35834, 37720, 45182, 47560, 50692, 54694, 63365, 71668, 89585, 90364, 101384, 109388, 112955, 126730, 136735, 143336, 179170, 180728, 218776, 225910, 253460, 273470, 358340, 451820, 506920, 519593, 546940, 716680, 903640, 1039186, 1093880, 2078372, 2597965, 4156744, 5195930, 10391860, 20783720]

約数ペア:

[(1, 20783720), (2, 10391860), (4, 5195930), (5, 4156744), (8, 2597965), (10, 2078372), (19, 1093880), (20, 1039186), (23, 903640), (29, 716680), (38, 546940), (40, 519593), (41, 506920), (46, 451820), (58, 358340), (76, 273470), (82, 253460), (92, 225910), (95, 218776), (115, 180728), (116, 179170), (145, 143336), (152, 136735), (164, 126730), (184, 112955), (190, 109388), (205, 101384), (230, 90364), (232, 89585), (290, 71668), (328, 63365), (380, 54694), (410, 50692), (437, 47560), (460, 45182), (551, 37720), (580, 35834), (667, 31160), (760, 27347), (779, 26680), (820, 25346), (874, 23780), (920, 22591), (943, 22040), (1102, 18860), (1160, 17917), (1189, 17480), (1334, 15580), (1558, 13340), (1640, 12673), (1748, 11890), (1886, 11020), (2185, 9512), (2204, 9430), (2378, 8740), (2668, 7790), (2755, 7544), (3116, 6670), (3335, 6232), (3496, 5945), (3772, 5510), (3895, 5336), (4370, 4756), (4408, 4715)]