21135140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^4\times {\mathrm{37}}^1$

素因数の和:98

約数の個数: 60

約数和(自身を含む): 49381836

約数和(自身を除く): 28246696

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 169, 185, 260, 338, 370, 481, 676, 740, 845, 962, 1690, 1924, 2197, 2405, 3380, 4394, 4810, 6253, 8788, 9620, 10985, 12506, 21970, 25012, 28561, 31265, 43940, 57122, 62530, 81289, 114244, 125060, 142805, 162578, 285610, 325156, 406445, 571220, 812890, 1056757, 1625780, 2113514, 4227028, 5283785, 10567570, 21135140]

約数ペア:

[(1, 21135140), (2, 10567570), (4, 5283785), (5, 4227028), (10, 2113514), (13, 1625780), (20, 1056757), (26, 812890), (37, 571220), (52, 406445), (65, 325156), (74, 285610), (130, 162578), (148, 142805), (169, 125060), (185, 114244), (260, 81289), (338, 62530), (370, 57122), (481, 43940), (676, 31265), (740, 28561), (845, 25012), (962, 21970), (1690, 12506), (1924, 10985), (2197, 9620), (2405, 8788), (3380, 6253), (4394, 4810)]