646660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 1612800

約数和(自身を除く): 966140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 149, 155, 217, 298, 310, 434, 596, 620, 745, 868, 1043, 1085, 1490, 2086, 2170, 2980, 4172, 4340, 4619, 5215, 9238, 10430, 18476, 20860, 23095, 32333, 46190, 64666, 92380, 129332, 161665, 323330, 646660]

約数ペア:

[(1, 646660), (2, 323330), (4, 161665), (5, 129332), (7, 92380), (10, 64666), (14, 46190), (20, 32333), (28, 23095), (31, 20860), (35, 18476), (62, 10430), (70, 9238), (124, 5215), (140, 4619), (149, 4340), (155, 4172), (217, 2980), (298, 2170), (310, 2086), (434, 1490), (596, 1085), (620, 1043), (745, 868)]