20287516

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 39424000

約数和(自身を除く): 19136484

約数列:

[1, 2, 4, 19, 31, 38, 62, 76, 79, 109, 124, 158, 218, 316, 436, 589, 1178, 1501, 2071, 2356, 2449, 3002, 3379, 4142, 4898, 6004, 6758, 8284, 8611, 9796, 13516, 17222, 34444, 46531, 64201, 93062, 128402, 163609, 186124, 256804, 266941, 327218, 533882, 654436, 1067764, 5071879, 10143758, 20287516]

約数ペア:

[(1, 20287516), (2, 10143758), (4, 5071879), (19, 1067764), (31, 654436), (38, 533882), (62, 327218), (76, 266941), (79, 256804), (109, 186124), (124, 163609), (158, 128402), (218, 93062), (316, 64201), (436, 46531), (589, 34444), (1178, 17222), (1501, 13516), (2071, 9796), (2356, 8611), (2449, 8284), (3002, 6758), (3379, 6004), (4142, 4898)]