20458508

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 42674688

約数和(自身を除く): 22216180

約数列:

[1, 2, 4, 7, 14, 28, 41, 71, 82, 142, 164, 251, 284, 287, 497, 502, 574, 994, 1004, 1148, 1757, 1988, 2911, 3514, 5822, 7028, 10291, 11644, 17821, 20377, 20582, 35642, 40754, 41164, 71284, 72037, 81508, 124747, 144074, 249494, 288148, 498988, 730661, 1461322, 2922644, 5114627, 10229254, 20458508]

約数ペア:

[(1, 20458508), (2, 10229254), (4, 5114627), (7, 2922644), (14, 1461322), (28, 730661), (41, 498988), (71, 288148), (82, 249494), (142, 144074), (164, 124747), (251, 81508), (284, 72037), (287, 71284), (497, 41164), (502, 40754), (574, 35642), (994, 20582), (1004, 20377), (1148, 17821), (1757, 11644), (1988, 10291), (2911, 7028), (3514, 5822)]