30911960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:396

約数の個数: 64

約数和(自身を含む): 72817920

約数和(自身を除く): 41905960

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 97, 124, 155, 194, 248, 257, 310, 388, 485, 514, 620, 776, 970, 1028, 1240, 1285, 1940, 2056, 2570, 3007, 3880, 5140, 6014, 7967, 10280, 12028, 15035, 15934, 24056, 24929, 30070, 31868, 39835, 49858, 60140, 63736, 79670, 99716, 120280, 124645, 159340, 199432, 249290, 318680, 498580, 772799, 997160, 1545598, 3091196, 3863995, 6182392, 7727990, 15455980, 30911960]

約数ペア:

[(1, 30911960), (2, 15455980), (4, 7727990), (5, 6182392), (8, 3863995), (10, 3091196), (20, 1545598), (31, 997160), (40, 772799), (62, 498580), (97, 318680), (124, 249290), (155, 199432), (194, 159340), (248, 124645), (257, 120280), (310, 99716), (388, 79670), (485, 63736), (514, 60140), (620, 49858), (776, 39835), (970, 31868), (1028, 30070), (1240, 24929), (1285, 24056), (1940, 15934), (2056, 15035), (2570, 12028), (3007, 10280), (3880, 7967), (5140, 6014)]