21546820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{499}}^1$

素因数の和:652

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 26837180

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 127, 170, 254, 340, 499, 508, 635, 998, 1270, 1996, 2159, 2495, 2540, 4318, 4990, 8483, 8636, 9980, 10795, 16966, 21590, 33932, 42415, 43180, 63373, 84830, 126746, 169660, 253492, 316865, 633730, 1077341, 1267460, 2154682, 4309364, 5386705, 10773410, 21546820]

約数ペア:

[(1, 21546820), (2, 10773410), (4, 5386705), (5, 4309364), (10, 2154682), (17, 1267460), (20, 1077341), (34, 633730), (68, 316865), (85, 253492), (127, 169660), (170, 126746), (254, 84830), (340, 63373), (499, 43180), (508, 42415), (635, 33932), (998, 21590), (1270, 16966), (1996, 10795), (2159, 9980), (2495, 8636), (2540, 8483), (4318, 4990)]