21966620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 51219504

約数和(自身を除く): 29252884

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 97, 130, 134, 169, 194, 260, 268, 335, 338, 388, 485, 670, 676, 845, 871, 970, 1261, 1340, 1690, 1742, 1940, 2522, 3380, 3484, 4355, 5044, 6305, 6499, 8710, 11323, 12610, 12998, 16393, 17420, 22646, 25220, 25996, 32495, 32786, 45292, 56615, 64990, 65572, 81965, 84487, 113230, 129980, 163930, 168974, 226460, 327860, 337948, 422435, 844870, 1098331, 1689740, 2196662, 4393324, 5491655, 10983310, 21966620]

約数ペア:

[(1, 21966620), (2, 10983310), (4, 5491655), (5, 4393324), (10, 2196662), (13, 1689740), (20, 1098331), (26, 844870), (52, 422435), (65, 337948), (67, 327860), (97, 226460), (130, 168974), (134, 163930), (169, 129980), (194, 113230), (260, 84487), (268, 81965), (335, 65572), (338, 64990), (388, 56615), (485, 45292), (670, 32786), (676, 32495), (845, 25996), (871, 25220), (970, 22646), (1261, 17420), (1340, 16393), (1690, 12998), (1742, 12610), (1940, 11323), (2522, 8710), (3380, 6499), (3484, 6305), (4355, 5044)]