16040020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{631}}^1$

素因数の和:712

約数の個数: 48

約数和(自身を含む): 35675136

約数和(自身を除く): 19635116

約数列:

[1, 2, 4, 5, 10, 20, 31, 41, 62, 82, 124, 155, 164, 205, 310, 410, 620, 631, 820, 1262, 1271, 2524, 2542, 3155, 5084, 6310, 6355, 12620, 12710, 19561, 25420, 25871, 39122, 51742, 78244, 97805, 103484, 129355, 195610, 258710, 391220, 517420, 802001, 1604002, 3208004, 4010005, 8020010, 16040020]

約数ペア:

[(1, 16040020), (2, 8020010), (4, 4010005), (5, 3208004), (10, 1604002), (20, 802001), (31, 517420), (41, 391220), (62, 258710), (82, 195610), (124, 129355), (155, 103484), (164, 97805), (205, 78244), (310, 51742), (410, 39122), (620, 25871), (631, 25420), (820, 19561), (1262, 12710), (1271, 12620), (2524, 6355), (2542, 6310), (3155, 5084)]