21325240

素因数分解:

$2^3\times 5^1\times {\mathrm{659}}^1\times {\mathrm{809}}^1$

素因数の和:1479

約数の個数: 32

約数和(自身を含む): 48114000

約数和(自身を除く): 26788760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 659, 809, 1318, 1618, 2636, 3236, 3295, 4045, 5272, 6472, 6590, 8090, 13180, 16180, 26360, 32360, 533131, 1066262, 2132524, 2665655, 4265048, 5331310, 10662620, 21325240]

約数ペア:

[(1, 21325240), (2, 10662620), (4, 5331310), (5, 4265048), (8, 2665655), (10, 2132524), (20, 1066262), (40, 533131), (659, 32360), (809, 26360), (1318, 16180), (1618, 13180), (2636, 8090), (3236, 6590), (3295, 6472), (4045, 5272)]