21615256

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{677}}^1$

素因数の和:1003

約数の個数: 32

約数和(自身を含む): 43853040

約数和(自身を除く): 22237784

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 307, 614, 677, 1228, 1354, 2456, 2708, 3991, 5416, 7982, 8801, 15964, 17602, 31928, 35204, 70408, 207839, 415678, 831356, 1662712, 2701907, 5403814, 10807628, 21615256]

約数ペア:

[(1, 21615256), (2, 10807628), (4, 5403814), (8, 2701907), (13, 1662712), (26, 831356), (52, 415678), (104, 207839), (307, 70408), (614, 35204), (677, 31928), (1228, 17602), (1354, 15964), (2456, 8801), (2708, 7982), (3991, 5416)]