256720360

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{493693}}^1$

素因数の和:493717

約数の個数: 32

約数和(自身を含む): 622054440

約数和(自身を除く): 365334080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 493693, 987386, 1974772, 2468465, 3949544, 4936930, 6418009, 9873860, 12836018, 19747720, 25672036, 32090045, 51344072, 64180090, 128360180, 256720360]

約数ペア:

[(1, 256720360), (2, 128360180), (4, 64180090), (5, 51344072), (8, 32090045), (10, 25672036), (13, 19747720), (20, 12836018), (26, 9873860), (40, 6418009), (52, 4936930), (65, 3949544), (104, 2468465), (130, 1974772), (260, 987386), (520, 493693)]