681380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 1698816

約数和(自身を除く): 1017436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 157, 217, 310, 314, 434, 620, 628, 785, 868, 1085, 1099, 1570, 2170, 2198, 3140, 4340, 4396, 4867, 5495, 9734, 10990, 19468, 21980, 24335, 34069, 48670, 68138, 97340, 136276, 170345, 340690, 681380]

約数ペア:

[(1, 681380), (2, 340690), (4, 170345), (5, 136276), (7, 97340), (10, 68138), (14, 48670), (20, 34069), (28, 24335), (31, 21980), (35, 19468), (62, 10990), (70, 9734), (124, 5495), (140, 4867), (155, 4396), (157, 4340), (217, 3140), (310, 2198), (314, 2170), (434, 1570), (620, 1099), (628, 1085), (785, 868)]