8780440

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 20885760

約数和(自身を除く): 12105320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 73, 97, 124, 146, 155, 194, 248, 292, 310, 365, 388, 485, 584, 620, 730, 776, 970, 1240, 1460, 1940, 2263, 2920, 3007, 3880, 4526, 6014, 7081, 9052, 11315, 12028, 14162, 15035, 18104, 22630, 24056, 28324, 30070, 35405, 45260, 56648, 60140, 70810, 90520, 120280, 141620, 219511, 283240, 439022, 878044, 1097555, 1756088, 2195110, 4390220, 8780440]

約数ペア:

[(1, 8780440), (2, 4390220), (4, 2195110), (5, 1756088), (8, 1097555), (10, 878044), (20, 439022), (31, 283240), (40, 219511), (62, 141620), (73, 120280), (97, 90520), (124, 70810), (146, 60140), (155, 56648), (194, 45260), (248, 35405), (292, 30070), (310, 28324), (365, 24056), (388, 22630), (485, 18104), (584, 15035), (620, 14162), (730, 12028), (776, 11315), (970, 9052), (1240, 7081), (1460, 6014), (1940, 4526), (2263, 3880), (2920, 3007)]