81650980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{263}}^1$

素因数の和:353

約数の個数: 72

約数和(自身を含む): 185879232

約数和(自身を除く): 104228252

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 263, 361, 380, 430, 526, 722, 817, 860, 1052, 1315, 1444, 1634, 1805, 2630, 3268, 3610, 4085, 4997, 5260, 7220, 8170, 9994, 11309, 15523, 16340, 19988, 22618, 24985, 31046, 45236, 49970, 56545, 62092, 77615, 94943, 99940, 113090, 155230, 189886, 214871, 226180, 310460, 379772, 429742, 474715, 859484, 949430, 1074355, 1898860, 2148710, 4082549, 4297420, 8165098, 16330196, 20412745, 40825490, 81650980]

約数ペア:

[(1, 81650980), (2, 40825490), (4, 20412745), (5, 16330196), (10, 8165098), (19, 4297420), (20, 4082549), (38, 2148710), (43, 1898860), (76, 1074355), (86, 949430), (95, 859484), (172, 474715), (190, 429742), (215, 379772), (263, 310460), (361, 226180), (380, 214871), (430, 189886), (526, 155230), (722, 113090), (817, 99940), (860, 94943), (1052, 77615), (1315, 62092), (1444, 56545), (1634, 49970), (1805, 45236), (2630, 31046), (3268, 24985), (3610, 22618), (4085, 19988), (4997, 16340), (5260, 15523), (7220, 11309), (8170, 9994)]