21009820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4253}}^1$

素因数の和:4294

約数の個数: 48

約数和(自身を含む): 50027040

約数和(自身を除く): 29017220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4253, 4940, 8506, 17012, 21265, 42530, 55289, 80807, 85060, 110578, 161614, 221156, 276445, 323228, 404035, 552890, 808070, 1050491, 1105780, 1616140, 2100982, 4201964, 5252455, 10504910, 21009820]

約数ペア:

[(1, 21009820), (2, 10504910), (4, 5252455), (5, 4201964), (10, 2100982), (13, 1616140), (19, 1105780), (20, 1050491), (26, 808070), (38, 552890), (52, 404035), (65, 323228), (76, 276445), (95, 221156), (130, 161614), (190, 110578), (247, 85060), (260, 80807), (380, 55289), (494, 42530), (988, 21265), (1235, 17012), (2470, 8506), (4253, 4940)]