81256920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{227}}^1$

素因数の和:417

約数の個数: 128

約数和(自身を含む): 259372800

約数和(自身を除く): 178115880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 57, 60, 76, 95, 114, 120, 152, 157, 190, 227, 228, 285, 314, 380, 454, 456, 471, 570, 628, 681, 760, 785, 908, 942, 1135, 1140, 1256, 1362, 1570, 1816, 1884, 2270, 2280, 2355, 2724, 2983, 3140, 3405, 3768, 4313, 4540, 4710, 5448, 5966, 6280, 6810, 8626, 8949, 9080, 9420, 11932, 12939, 13620, 14915, 17252, 17898, 18840, 21565, 23864, 25878, 27240, 29830, 34504, 35639, 35796, 43130, 44745, 51756, 59660, 64695, 71278, 71592, 86260, 89490, 103512, 106917, 119320, 129390, 142556, 172520, 178195, 178980, 213834, 258780, 285112, 356390, 357960, 427668, 517560, 534585, 677141, 712780, 855336, 1069170, 1354282, 1425560, 2031423, 2138340, 2708564, 3385705, 4062846, 4276680, 5417128, 6771410, 8125692, 10157115, 13542820, 16251384, 20314230, 27085640, 40628460, 81256920]

約数ペア:

[(1, 81256920), (2, 40628460), (3, 27085640), (4, 20314230), (5, 16251384), (6, 13542820), (8, 10157115), (10, 8125692), (12, 6771410), (15, 5417128), (19, 4276680), (20, 4062846), (24, 3385705), (30, 2708564), (38, 2138340), (40, 2031423), (57, 1425560), (60, 1354282), (76, 1069170), (95, 855336), (114, 712780), (120, 677141), (152, 534585), (157, 517560), (190, 427668), (227, 357960), (228, 356390), (285, 285112), (314, 258780), (380, 213834), (454, 178980), (456, 178195), (471, 172520), (570, 142556), (628, 129390), (681, 119320), (760, 106917), (785, 103512), (908, 89490), (942, 86260), (1135, 71592), (1140, 71278), (1256, 64695), (1362, 59660), (1570, 51756), (1816, 44745), (1884, 43130), (2270, 35796), (2280, 35639), (2355, 34504), (2724, 29830), (2983, 27240), (3140, 25878), (3405, 23864), (3768, 21565), (4313, 18840), (4540, 17898), (4710, 17252), (5448, 14915), (5966, 13620), (6280, 12939), (6810, 11932), (8626, 9420), (8949, 9080)]