20843940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26723}}^1$

素因数の和:26748

約数の個数: 48

約数和(自身を含む): 62854848

約数和(自身を除く): 42010908

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 26723, 53446, 80169, 106892, 133615, 160338, 267230, 320676, 347399, 400845, 534460, 694798, 801690, 1042197, 1389596, 1603380, 1736995, 2084394, 3473990, 4168788, 5210985, 6947980, 10421970, 20843940]

約数ペア:

[(1, 20843940), (2, 10421970), (3, 6947980), (4, 5210985), (5, 4168788), (6, 3473990), (10, 2084394), (12, 1736995), (13, 1603380), (15, 1389596), (20, 1042197), (26, 801690), (30, 694798), (39, 534460), (52, 400845), (60, 347399), (65, 320676), (78, 267230), (130, 160338), (156, 133615), (195, 106892), (260, 80169), (390, 53446), (780, 26723)]