386917820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{41}}^1\times {\mathrm{491}}^1$

素因数の和:603

約数の個数: 72

約数和(自身を含む): 861812784

約数和(自身を除く): 474894964

約数列:

[1, 2, 4, 5, 10, 20, 31, 41, 62, 82, 124, 155, 164, 205, 310, 410, 491, 620, 820, 961, 982, 1271, 1922, 1964, 2455, 2542, 3844, 4805, 4910, 5084, 6355, 9610, 9820, 12710, 15221, 19220, 20131, 25420, 30442, 39401, 40262, 60884, 76105, 78802, 80524, 100655, 152210, 157604, 197005, 201310, 304420, 394010, 402620, 471851, 624061, 788020, 943702, 1248122, 1887404, 2359255, 2496244, 3120305, 4718510, 6240610, 9437020, 12481220, 19345891, 38691782, 77383564, 96729455, 193458910, 386917820]

約数ペア:

[(1, 386917820), (2, 193458910), (4, 96729455), (5, 77383564), (10, 38691782), (20, 19345891), (31, 12481220), (41, 9437020), (62, 6240610), (82, 4718510), (124, 3120305), (155, 2496244), (164, 2359255), (205, 1887404), (310, 1248122), (410, 943702), (491, 788020), (620, 624061), (820, 471851), (961, 402620), (982, 394010), (1271, 304420), (1922, 201310), (1964, 197005), (2455, 157604), (2542, 152210), (3844, 100655), (4805, 80524), (4910, 78802), (5084, 76105), (6355, 60884), (9610, 40262), (9820, 39401), (12710, 30442), (15221, 25420), (19220, 20131)]