21513180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27581}}^1$

素因数の和:27606

約数の個数: 48

約数和(自身を含む): 64872864

約数和(自身を除く): 43359684

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, 27581, 55162, 82743, 110324, 137905, 165486, 275810, 330972, 358553, 413715, 551620, 717106, 827430, 1075659, 1434212, 1654860, 1792765, 2151318, 3585530, 4302636, 5378295, 7171060, 10756590, 21513180]

約数ペア:

[(1, 21513180), (2, 10756590), (3, 7171060), (4, 5378295), (5, 4302636), (6, 3585530), (10, 2151318), (12, 1792765), (13, 1654860), (15, 1434212), (20, 1075659), (26, 827430), (30, 717106), (39, 551620), (52, 413715), (60, 358553), (65, 330972), (78, 275810), (130, 165486), (156, 137905), (195, 110324), (260, 82743), (390, 55162), (780, 27581)]