1138860020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{20639}}^1$

素因数の和:20768

約数の個数: 48

約数和(自身を含む): 2496614400

約数和(自身を除く): 1357754380

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 89, 124, 155, 178, 310, 356, 445, 620, 890, 1780, 2759, 5518, 11036, 13795, 20639, 27590, 41278, 55180, 82556, 103195, 206390, 412780, 639809, 1279618, 1836871, 2559236, 3199045, 3673742, 6398090, 7347484, 9184355, 12796180, 18368710, 36737420, 56943001, 113886002, 227772004, 284715005, 569430010, 1138860020]

約数ペア:

[(1, 1138860020), (2, 569430010), (4, 284715005), (5, 227772004), (10, 113886002), (20, 56943001), (31, 36737420), (62, 18368710), (89, 12796180), (124, 9184355), (155, 7347484), (178, 6398090), (310, 3673742), (356, 3199045), (445, 2559236), (620, 1836871), (890, 1279618), (1780, 639809), (2759, 412780), (5518, 206390), (11036, 103195), (13795, 82556), (20639, 55180), (27590, 41278)]