400875560

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{67261}}^1$

素因数の和:67421

約数の個数: 32

約数和(自身を含む): 908037000

約数和(自身を除く): 507161440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 596, 745, 1192, 1490, 2980, 5960, 67261, 134522, 269044, 336305, 538088, 672610, 1345220, 2690440, 10021889, 20043778, 40087556, 50109445, 80175112, 100218890, 200437780, 400875560]

約数ペア:

[(1, 400875560), (2, 200437780), (4, 100218890), (5, 80175112), (8, 50109445), (10, 40087556), (20, 20043778), (40, 10021889), (149, 2690440), (298, 1345220), (596, 672610), (745, 538088), (1192, 336305), (1490, 269044), (2980, 134522), (5960, 67261)]