81818820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{19763}}^1$

素因数の和:19801

約数の個数: 72

約数和(自身を含む): 258987456

約数和(自身を除く): 177168636

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 90, 92, 115, 138, 180, 207, 230, 276, 345, 414, 460, 690, 828, 1035, 1380, 2070, 4140, 19763, 39526, 59289, 79052, 98815, 118578, 177867, 197630, 237156, 296445, 355734, 395260, 454549, 592890, 711468, 889335, 909098, 1185780, 1363647, 1778670, 1818196, 2272745, 2727294, 3557340, 4090941, 4545490, 5454588, 6818235, 8181882, 9090980, 13636470, 16363764, 20454705, 27272940, 40909410, 81818820]

約数ペア:

[(1, 81818820), (2, 40909410), (3, 27272940), (4, 20454705), (5, 16363764), (6, 13636470), (9, 9090980), (10, 8181882), (12, 6818235), (15, 5454588), (18, 4545490), (20, 4090941), (23, 3557340), (30, 2727294), (36, 2272745), (45, 1818196), (46, 1778670), (60, 1363647), (69, 1185780), (90, 909098), (92, 889335), (115, 711468), (138, 592890), (180, 454549), (207, 395260), (230, 355734), (276, 296445), (345, 237156), (414, 197630), (460, 177867), (690, 118578), (828, 98815), (1035, 79052), (1380, 59289), (2070, 39526), (4140, 19763)]