21547945

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:193

約数の個数: 32

約数和(自身を含む): 28283904

約数和(自身を除く): 6735959

約数列:

[1, 5, 31, 43, 53, 61, 155, 215, 265, 305, 1333, 1643, 1891, 2279, 2623, 3233, 6665, 8215, 9455, 11395, 13115, 16165, 70649, 81313, 100223, 139019, 353245, 406565, 501115, 695095, 4309589, 21547945]

約数ペア:

[(1, 21547945), (5, 4309589), (31, 695095), (43, 501115), (53, 406565), (61, 353245), (155, 139019), (215, 100223), (265, 81313), (305, 70649), (1333, 16165), (1643, 13115), (1891, 11395), (2279, 9455), (2623, 8215), (3233, 6665)]