20861788

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 40824000

約数和(自身を除く): 19962212

約数列:

[1, 2, 4, 17, 29, 34, 58, 68, 71, 116, 142, 149, 284, 298, 493, 596, 986, 1207, 1972, 2059, 2414, 2533, 4118, 4321, 4828, 5066, 8236, 8642, 10132, 10579, 17284, 21158, 35003, 42316, 70006, 73457, 140012, 146914, 179843, 293828, 306791, 359686, 613582, 719372, 1227164, 5215447, 10430894, 20861788]

約数ペア:

[(1, 20861788), (2, 10430894), (4, 5215447), (17, 1227164), (29, 719372), (34, 613582), (58, 359686), (68, 306791), (71, 293828), (116, 179843), (142, 146914), (149, 140012), (284, 73457), (298, 70006), (493, 42316), (596, 35003), (986, 21158), (1207, 17284), (1972, 10579), (2059, 10132), (2414, 8642), (2533, 8236), (4118, 5066), (4321, 4828)]