21278648

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{239}}^1\times {\mathrm{359}}^1$

素因数の和:635

約数の個数: 32

約数和(自身を含む): 41472000

約数和(自身を除く): 20193352

約数列:

[1, 2, 4, 8, 31, 62, 124, 239, 248, 359, 478, 718, 956, 1436, 1912, 2872, 7409, 11129, 14818, 22258, 29636, 44516, 59272, 85801, 89032, 171602, 343204, 686408, 2659831, 5319662, 10639324, 21278648]

約数ペア:

[(1, 21278648), (2, 10639324), (4, 5319662), (8, 2659831), (31, 686408), (62, 343204), (124, 171602), (239, 89032), (248, 85801), (359, 59272), (478, 44516), (718, 29636), (956, 22258), (1436, 14818), (1912, 11129), (2872, 7409)]