21975280

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8861}}^1$

素因数の和:8905

約数の個数: 40

約数和(自身を含む): 52746624

約数和(自身を除く): 30771344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8861, 17722, 35444, 44305, 70888, 88610, 141776, 177220, 274691, 354440, 549382, 708880, 1098764, 1373455, 2197528, 2746910, 4395056, 5493820, 10987640, 21975280]

約数ペア:

[(1, 21975280), (2, 10987640), (4, 5493820), (5, 4395056), (8, 2746910), (10, 2197528), (16, 1373455), (20, 1098764), (31, 708880), (40, 549382), (62, 354440), (80, 274691), (124, 177220), (155, 141776), (248, 88610), (310, 70888), (496, 44305), (620, 35444), (1240, 17722), (2480, 8861)]