311993780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{241}}^1\times {\mathrm{1321}}^1$

素因数の和:1585

約数の個数: 72

約数和(自身を含む): 765898056

約数和(自身を除く): 453904276

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 241, 245, 482, 490, 964, 980, 1205, 1321, 1687, 2410, 2642, 3374, 4820, 5284, 6605, 6748, 8435, 9247, 11809, 13210, 16870, 18494, 23618, 26420, 33740, 36988, 46235, 47236, 59045, 64729, 92470, 118090, 129458, 184940, 236180, 258916, 318361, 323645, 636722, 647290, 1273444, 1294580, 1591805, 2228527, 3183610, 4457054, 6367220, 8914108, 11142635, 15599689, 22285270, 31199378, 44570540, 62398756, 77998445, 155996890, 311993780]

約数ペア:

[(1, 311993780), (2, 155996890), (4, 77998445), (5, 62398756), (7, 44570540), (10, 31199378), (14, 22285270), (20, 15599689), (28, 11142635), (35, 8914108), (49, 6367220), (70, 4457054), (98, 3183610), (140, 2228527), (196, 1591805), (241, 1294580), (245, 1273444), (482, 647290), (490, 636722), (964, 323645), (980, 318361), (1205, 258916), (1321, 236180), (1687, 184940), (2410, 129458), (2642, 118090), (3374, 92470), (4820, 64729), (5284, 59045), (6605, 47236), (6748, 46235), (8435, 36988), (9247, 33740), (11809, 26420), (13210, 23618), (16870, 18494)]