18198860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 39916800

約数和(自身を除く): 21717940

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 149, 155, 197, 298, 310, 394, 596, 620, 745, 788, 985, 1490, 1970, 2980, 3940, 4619, 6107, 9238, 12214, 18476, 23095, 24428, 29353, 30535, 46190, 58706, 61070, 92380, 117412, 122140, 146765, 293530, 587060, 909943, 1819886, 3639772, 4549715, 9099430, 18198860]

約数ペア:

[(1, 18198860), (2, 9099430), (4, 4549715), (5, 3639772), (10, 1819886), (20, 909943), (31, 587060), (62, 293530), (124, 146765), (149, 122140), (155, 117412), (197, 92380), (298, 61070), (310, 58706), (394, 46190), (596, 30535), (620, 29353), (745, 24428), (788, 23095), (985, 18476), (1490, 12214), (1970, 9238), (2980, 6107), (3940, 4619)]