16804280

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 39372480

約数和(自身を除く): 22568200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 71, 97, 122, 142, 194, 244, 284, 305, 355, 388, 485, 488, 568, 610, 710, 776, 970, 1220, 1420, 1940, 2440, 2840, 3880, 4331, 5917, 6887, 8662, 11834, 13774, 17324, 21655, 23668, 27548, 29585, 34435, 34648, 43310, 47336, 55096, 59170, 68870, 86620, 118340, 137740, 173240, 236680, 275480, 420107, 840214, 1680428, 2100535, 3360856, 4201070, 8402140, 16804280]

約数ペア:

[(1, 16804280), (2, 8402140), (4, 4201070), (5, 3360856), (8, 2100535), (10, 1680428), (20, 840214), (40, 420107), (61, 275480), (71, 236680), (97, 173240), (122, 137740), (142, 118340), (194, 86620), (244, 68870), (284, 59170), (305, 55096), (355, 47336), (388, 43310), (485, 34648), (488, 34435), (568, 29585), (610, 27548), (710, 23668), (776, 21655), (970, 17324), (1220, 13774), (1420, 11834), (1940, 8662), (2440, 6887), (2840, 5917), (3880, 4331)]