21429680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8641}}^1$

素因数の和:8685

約数の個数: 40

約数和(自身を含む): 51437184

約数和(自身を除く): 30007504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8641, 17282, 34564, 43205, 69128, 86410, 138256, 172820, 267871, 345640, 535742, 691280, 1071484, 1339355, 2142968, 2678710, 4285936, 5357420, 10714840, 21429680]

約数ペア:

[(1, 21429680), (2, 10714840), (4, 5357420), (5, 4285936), (8, 2678710), (10, 2142968), (16, 1339355), (20, 1071484), (31, 691280), (40, 535742), (62, 345640), (80, 267871), (124, 172820), (155, 138256), (248, 86410), (310, 69128), (496, 43205), (620, 34564), (1240, 17282), (2480, 8641)]