21790760

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{6121}}^1$

素因数の和:6221

約数の個数: 32

約数和(自身を含む): 49588200

約数和(自身を除く): 27797440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 6121, 12242, 24484, 30605, 48968, 61210, 122420, 244840, 544769, 1089538, 2179076, 2723845, 4358152, 5447690, 10895380, 21790760]

約数ペア:

[(1, 21790760), (2, 10895380), (4, 5447690), (5, 4358152), (8, 2723845), (10, 2179076), (20, 1089538), (40, 544769), (89, 244840), (178, 122420), (356, 61210), (445, 48968), (712, 30605), (890, 24484), (1780, 12242), (3560, 6121)]