20259850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:535

約数の個数: 48

約数和(自身を含む): 41247360

約数和(自身を除く): 20987510

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 71, 130, 142, 325, 355, 439, 650, 710, 878, 923, 1775, 1846, 2195, 3550, 4390, 4615, 5707, 9230, 10975, 11414, 21950, 23075, 28535, 31169, 46150, 57070, 62338, 142675, 155845, 285350, 311690, 405197, 779225, 810394, 1558450, 2025985, 4051970, 10129925, 20259850]

約数ペア:

[(1, 20259850), (2, 10129925), (5, 4051970), (10, 2025985), (13, 1558450), (25, 810394), (26, 779225), (50, 405197), (65, 311690), (71, 285350), (130, 155845), (142, 142675), (325, 62338), (355, 57070), (439, 46150), (650, 31169), (710, 28535), (878, 23075), (923, 21950), (1775, 11414), (1846, 10975), (2195, 9230), (3550, 5707), (4390, 4615)]