8402140

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 18373824

約数和(自身を除く): 9971684

約数列:

[1, 2, 4, 5, 10, 20, 61, 71, 97, 122, 142, 194, 244, 284, 305, 355, 388, 485, 610, 710, 970, 1220, 1420, 1940, 4331, 5917, 6887, 8662, 11834, 13774, 17324, 21655, 23668, 27548, 29585, 34435, 43310, 59170, 68870, 86620, 118340, 137740, 420107, 840214, 1680428, 2100535, 4201070, 8402140]

約数ペア:

[(1, 8402140), (2, 4201070), (4, 2100535), (5, 1680428), (10, 840214), (20, 420107), (61, 137740), (71, 118340), (97, 86620), (122, 68870), (142, 59170), (194, 43310), (244, 34435), (284, 29585), (305, 27548), (355, 23668), (388, 21655), (485, 17324), (610, 13774), (710, 11834), (970, 8662), (1220, 6887), (1420, 5917), (1940, 4331)]