20643870

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1231}}^1$

素因数の和:1297

約数の個数: 64

約数和(自身を含む): 54641664

約数和(自身を除く): 33997794

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 43, 65, 78, 86, 129, 130, 195, 215, 258, 390, 430, 559, 645, 1118, 1231, 1290, 1677, 2462, 2795, 3354, 3693, 5590, 6155, 7386, 8385, 12310, 16003, 16770, 18465, 32006, 36930, 48009, 52933, 80015, 96018, 105866, 158799, 160030, 240045, 264665, 317598, 480090, 529330, 688129, 793995, 1376258, 1587990, 2064387, 3440645, 4128774, 6881290, 10321935, 20643870]

約数ペア:

[(1, 20643870), (2, 10321935), (3, 6881290), (5, 4128774), (6, 3440645), (10, 2064387), (13, 1587990), (15, 1376258), (26, 793995), (30, 688129), (39, 529330), (43, 480090), (65, 317598), (78, 264665), (86, 240045), (129, 160030), (130, 158799), (195, 105866), (215, 96018), (258, 80015), (390, 52933), (430, 48009), (559, 36930), (645, 32006), (1118, 18465), (1231, 16770), (1290, 16003), (1677, 12310), (2462, 8385), (2795, 7386), (3354, 6155), (3693, 5590)]