20561255

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{193}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 29332800

約数和(自身を除く): 8771545

約数列:

[1, 5, 11, 13, 55, 65, 143, 149, 193, 715, 745, 965, 1639, 1937, 2123, 2509, 8195, 9685, 10615, 12545, 21307, 27599, 28757, 106535, 137995, 143785, 316327, 373841, 1581635, 1869205, 4112251, 20561255]

約数ペア:

[(1, 20561255), (5, 4112251), (11, 1869205), (13, 1581635), (55, 373841), (65, 316327), (143, 143785), (149, 137995), (193, 106535), (715, 28757), (745, 27599), (965, 21307), (1639, 12545), (1937, 10615), (2123, 9685), (2509, 8195)]