20600005

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 27721440

約数和(自身を除く): 7121435

約数列:

[1, 5, 17, 29, 61, 85, 137, 145, 305, 493, 685, 1037, 1769, 2329, 2465, 3973, 5185, 8357, 8845, 11645, 19865, 30073, 41785, 67541, 142069, 150365, 242353, 337705, 710345, 1211765, 4120001, 20600005]

約数ペア:

[(1, 20600005), (5, 4120001), (17, 1211765), (29, 710345), (61, 337705), (85, 242353), (137, 150365), (145, 142069), (305, 67541), (493, 41785), (685, 30073), (1037, 19865), (1769, 11645), (2329, 8845), (2465, 8357), (3973, 5185)]