661913240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{533801}}^1$

素因数の和:533843

約数の個数: 32

約数和(自身を含む): 1537349760

約数和(自身を除く): 875436520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 533801, 1067602, 2135204, 2669005, 4270408, 5338010, 10676020, 16547831, 21352040, 33095662, 66191324, 82739155, 132382648, 165478310, 330956620, 661913240]

約数ペア:

[(1, 661913240), (2, 330956620), (4, 165478310), (5, 132382648), (8, 82739155), (10, 66191324), (20, 33095662), (31, 21352040), (40, 16547831), (62, 10676020), (124, 5338010), (155, 4270408), (248, 2669005), (310, 2135204), (620, 1067602), (1240, 533801)]