220640020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1\times {\mathrm{1489}}^1$

素因数の和:1768

約数の個数: 48

約数和(自身を含む): 480614400

約数和(自身を除く): 259974380

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 239, 310, 478, 620, 956, 1195, 1489, 2390, 2978, 4780, 5956, 7409, 7445, 14818, 14890, 29636, 29780, 37045, 46159, 74090, 92318, 148180, 184636, 230795, 355871, 461590, 711742, 923180, 1423484, 1779355, 3558710, 7117420, 11032001, 22064002, 44128004, 55160005, 110320010, 220640020]

約数ペア:

[(1, 220640020), (2, 110320010), (4, 55160005), (5, 44128004), (10, 22064002), (20, 11032001), (31, 7117420), (62, 3558710), (124, 1779355), (155, 1423484), (239, 923180), (310, 711742), (478, 461590), (620, 355871), (956, 230795), (1195, 184636), (1489, 148180), (2390, 92318), (2978, 74090), (4780, 46159), (5956, 37045), (7409, 29780), (7445, 29636), (14818, 14890)]