21487100

素因数分解:

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

素因数の和:339

約数の個数: 72

約数和(自身を含む): 50413440

約数和(自身を除く): 28926340

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 43, 50, 76, 86, 95, 100, 172, 190, 215, 263, 380, 430, 475, 526, 817, 860, 950, 1052, 1075, 1315, 1634, 1900, 2150, 2630, 3268, 4085, 4300, 4997, 5260, 6575, 8170, 9994, 11309, 13150, 16340, 19988, 20425, 22618, 24985, 26300, 40850, 45236, 49970, 56545, 81700, 99940, 113090, 124925, 214871, 226180, 249850, 282725, 429742, 499700, 565450, 859484, 1074355, 1130900, 2148710, 4297420, 5371775, 10743550, 21487100]

約数ペア:

[(1, 21487100), (2, 10743550), (4, 5371775), (5, 4297420), (10, 2148710), (19, 1130900), (20, 1074355), (25, 859484), (38, 565450), (43, 499700), (50, 429742), (76, 282725), (86, 249850), (95, 226180), (100, 214871), (172, 124925), (190, 113090), (215, 99940), (263, 81700), (380, 56545), (430, 49970), (475, 45236), (526, 40850), (817, 26300), (860, 24985), (950, 22618), (1052, 20425), (1075, 19988), (1315, 16340), (1634, 13150), (1900, 11309), (2150, 9994), (2630, 8170), (3268, 6575), (4085, 5260), (4300, 4997)]