20960620

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{509}}^1$

素因数の和:618

約数の個数: 48

約数和(自身を含む): 46267200

約数和(自身を除く): 25306580

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 509, 580, 710, 1018, 1420, 2036, 2059, 2545, 4118, 5090, 8236, 10180, 10295, 14761, 20590, 29522, 36139, 41180, 59044, 72278, 73805, 144556, 147610, 180695, 295220, 361390, 722780, 1048031, 2096062, 4192124, 5240155, 10480310, 20960620]

約数ペア:

[(1, 20960620), (2, 10480310), (4, 5240155), (5, 4192124), (10, 2096062), (20, 1048031), (29, 722780), (58, 361390), (71, 295220), (116, 180695), (142, 147610), (145, 144556), (284, 73805), (290, 72278), (355, 59044), (509, 41180), (580, 36139), (710, 29522), (1018, 20590), (1420, 14761), (2036, 10295), (2059, 10180), (2545, 8236), (4118, 5090)]