21295144

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{2467}}^1$

素因数の和:2569

約数の個数: 32

約数和(自身を含む): 43535520

約数和(自身を除く): 22240376

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 332, 664, 1079, 2158, 2467, 4316, 4934, 8632, 9868, 19736, 32071, 64142, 128284, 204761, 256568, 409522, 819044, 1638088, 2661893, 5323786, 10647572, 21295144]

約数ペア:

[(1, 21295144), (2, 10647572), (4, 5323786), (8, 2661893), (13, 1638088), (26, 819044), (52, 409522), (83, 256568), (104, 204761), (166, 128284), (332, 64142), (664, 32071), (1079, 19736), (2158, 9868), (2467, 8632), (4316, 4934)]