68681990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:297

約数の個数: 64

約数和(自身を含む): 139043520

約数和(自身を除く): 70361530

約数列:

[1, 2, 5, 10, 13, 26, 37, 65, 74, 109, 130, 131, 185, 218, 262, 370, 481, 545, 655, 962, 1090, 1310, 1417, 1703, 2405, 2834, 3406, 4033, 4810, 4847, 7085, 8066, 8515, 9694, 14170, 14279, 17030, 20165, 24235, 28558, 40330, 48470, 52429, 63011, 71395, 104858, 126022, 142790, 185627, 262145, 315055, 371254, 524290, 528323, 630110, 928135, 1056646, 1856270, 2641615, 5283230, 6868199, 13736398, 34340995, 68681990]

約数ペア:

[(1, 68681990), (2, 34340995), (5, 13736398), (10, 6868199), (13, 5283230), (26, 2641615), (37, 1856270), (65, 1056646), (74, 928135), (109, 630110), (130, 528323), (131, 524290), (185, 371254), (218, 315055), (262, 262145), (370, 185627), (481, 142790), (545, 126022), (655, 104858), (962, 71395), (1090, 63011), (1310, 52429), (1417, 48470), (1703, 40330), (2405, 28558), (2834, 24235), (3406, 20165), (4033, 17030), (4810, 14279), (4847, 14170), (7085, 9694), (8066, 8515)]