1291362440

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{408659}}^1$

素因数の和:408749

約数の個数: 32

約数和(自身を含む): 2942352000

約数和(自身を除く): 1650989560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 408659, 817318, 1634636, 2043295, 3269272, 4086590, 8173180, 16346360, 32284061, 64568122, 129136244, 161420305, 258272488, 322840610, 645681220, 1291362440]

約数ペア:

[(1, 1291362440), (2, 645681220), (4, 322840610), (5, 258272488), (8, 161420305), (10, 129136244), (20, 64568122), (40, 32284061), (79, 16346360), (158, 8173180), (316, 4086590), (395, 3269272), (632, 2043295), (790, 1634636), (1580, 817318), (3160, 408659)]