397726420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{218531}}^1$

素因数の和:218560

約数の個数: 48

約数和(自身を含む): 1027974528

約数和(自身を除く): 630248108

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 218531, 437062, 874124, 1092655, 1529717, 2185310, 2840903, 3059434, 4370620, 5681806, 6118868, 7648585, 11363612, 14204515, 15297170, 19886321, 28409030, 30594340, 39772642, 56818060, 79545284, 99431605, 198863210, 397726420]

約数ペア:

[(1, 397726420), (2, 198863210), (4, 99431605), (5, 79545284), (7, 56818060), (10, 39772642), (13, 30594340), (14, 28409030), (20, 19886321), (26, 15297170), (28, 14204515), (35, 11363612), (52, 7648585), (65, 6118868), (70, 5681806), (91, 4370620), (130, 3059434), (140, 2840903), (182, 2185310), (260, 1529717), (364, 1092655), (455, 874124), (910, 437062), (1820, 218531)]