31211120

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^2\times {\mathrm{211}}^1$

素因数の和:310

約数の個数: 60

約数和(自身を含む): 74644776

約数和(自身を除く): 43433656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 211, 215, 344, 422, 430, 688, 844, 860, 1055, 1688, 1720, 1849, 2110, 3376, 3440, 3698, 4220, 7396, 8440, 9073, 9245, 14792, 16880, 18146, 18490, 29584, 36292, 36980, 45365, 72584, 73960, 90730, 145168, 147920, 181460, 362920, 390139, 725840, 780278, 1560556, 1950695, 3121112, 3901390, 6242224, 7802780, 15605560, 31211120]

約数ペア:

[(1, 31211120), (2, 15605560), (4, 7802780), (5, 6242224), (8, 3901390), (10, 3121112), (16, 1950695), (20, 1560556), (40, 780278), (43, 725840), (80, 390139), (86, 362920), (172, 181460), (211, 147920), (215, 145168), (344, 90730), (422, 73960), (430, 72584), (688, 45365), (844, 36980), (860, 36292), (1055, 29584), (1688, 18490), (1720, 18146), (1849, 16880), (2110, 14792), (3376, 9245), (3440, 9073), (3698, 8440), (4220, 7396)]