21894980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{907}}^1$

素因数の和:1004

約数の個数: 48

約数和(自身を含む): 49424256

約数和(自身を除く): 27529276

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 71, 85, 142, 170, 284, 340, 355, 710, 907, 1207, 1420, 1814, 2414, 3628, 4535, 4828, 6035, 9070, 12070, 15419, 18140, 24140, 30838, 61676, 64397, 77095, 128794, 154190, 257588, 308380, 321985, 643970, 1094749, 1287940, 2189498, 4378996, 5473745, 10947490, 21894980]

約数ペア:

[(1, 21894980), (2, 10947490), (4, 5473745), (5, 4378996), (10, 2189498), (17, 1287940), (20, 1094749), (34, 643970), (68, 321985), (71, 308380), (85, 257588), (142, 154190), (170, 128794), (284, 77095), (340, 64397), (355, 61676), (710, 30838), (907, 24140), (1207, 18140), (1420, 15419), (1814, 12070), (2414, 9070), (3628, 6035), (4535, 4828)]