21679664

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{401}}^1$

素因数の和:549

約数の個数: 40

約数和(自身を含む): 43866240

約数和(自身を除く): 22186576

約数列:

[1, 2, 4, 8, 16, 31, 62, 109, 124, 218, 248, 401, 436, 496, 802, 872, 1604, 1744, 3208, 3379, 6416, 6758, 12431, 13516, 24862, 27032, 43709, 49724, 54064, 87418, 99448, 174836, 198896, 349672, 699344, 1354979, 2709958, 5419916, 10839832, 21679664]

約数ペア:

[(1, 21679664), (2, 10839832), (4, 5419916), (8, 2709958), (16, 1354979), (31, 699344), (62, 349672), (109, 198896), (124, 174836), (218, 99448), (248, 87418), (401, 54064), (436, 49724), (496, 43709), (802, 27032), (872, 24862), (1604, 13516), (1744, 12431), (3208, 6758), (3379, 6416)]