18043940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 39118464

約数和(自身を除く): 21074524

約数列:

[1, 2, 4, 5, 10, 20, 71, 97, 131, 142, 194, 262, 284, 355, 388, 485, 524, 655, 710, 970, 1310, 1420, 1940, 2620, 6887, 9301, 12707, 13774, 18602, 25414, 27548, 34435, 37204, 46505, 50828, 63535, 68870, 93010, 127070, 137740, 186020, 254140, 902197, 1804394, 3608788, 4510985, 9021970, 18043940]

約数ペア:

[(1, 18043940), (2, 9021970), (4, 4510985), (5, 3608788), (10, 1804394), (20, 902197), (71, 254140), (97, 186020), (131, 137740), (142, 127070), (194, 93010), (262, 68870), (284, 63535), (355, 50828), (388, 46505), (485, 37204), (524, 34435), (655, 27548), (710, 25414), (970, 18602), (1310, 13774), (1420, 12707), (1940, 9301), (2620, 6887)]