12780560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12289}}^1$

素因数の和:12315

約数の個数: 40

約数和(自身を含む): 32003160

約数和(自身を除く): 19222600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 12289, 24578, 49156, 61445, 98312, 122890, 159757, 196624, 245780, 319514, 491560, 639028, 798785, 983120, 1278056, 1597570, 2556112, 3195140, 6390280, 12780560]

約数ペア:

[(1, 12780560), (2, 6390280), (4, 3195140), (5, 2556112), (8, 1597570), (10, 1278056), (13, 983120), (16, 798785), (20, 639028), (26, 491560), (40, 319514), (52, 245780), (65, 196624), (80, 159757), (104, 122890), (130, 98312), (208, 61445), (260, 49156), (520, 24578), (1040, 12289)]