8218840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:364

約数の個数: 64

約数和(自身を含む): 21384000

約数和(自身を除く): 13165160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 149, 197, 280, 298, 394, 596, 745, 788, 985, 1043, 1192, 1379, 1490, 1576, 1970, 2086, 2758, 2980, 3940, 4172, 5215, 5516, 5960, 6895, 7880, 8344, 10430, 11032, 13790, 20860, 27580, 29353, 41720, 55160, 58706, 117412, 146765, 205471, 234824, 293530, 410942, 587060, 821884, 1027355, 1174120, 1643768, 2054710, 4109420, 8218840]

約数ペア:

[(1, 8218840), (2, 4109420), (4, 2054710), (5, 1643768), (7, 1174120), (8, 1027355), (10, 821884), (14, 587060), (20, 410942), (28, 293530), (35, 234824), (40, 205471), (56, 146765), (70, 117412), (140, 58706), (149, 55160), (197, 41720), (280, 29353), (298, 27580), (394, 20860), (596, 13790), (745, 11032), (788, 10430), (985, 8344), (1043, 7880), (1192, 6895), (1379, 5960), (1490, 5516), (1576, 5215), (1970, 4172), (2086, 3940), (2758, 2980)]