21907020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{83}}^2$

素因数の和:231

約数の個数: 72

約数和(自身を含む): 63259056

約数和(自身を除く): 41352036

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 53, 60, 83, 106, 159, 166, 212, 249, 265, 318, 332, 415, 498, 530, 636, 795, 830, 996, 1060, 1245, 1590, 1660, 2490, 3180, 4399, 4980, 6889, 8798, 13197, 13778, 17596, 20667, 21995, 26394, 27556, 34445, 41334, 43990, 52788, 65985, 68890, 82668, 87980, 103335, 131970, 137780, 206670, 263940, 365117, 413340, 730234, 1095351, 1460468, 1825585, 2190702, 3651170, 4381404, 5476755, 7302340, 10953510, 21907020]

約数ペア:

[(1, 21907020), (2, 10953510), (3, 7302340), (4, 5476755), (5, 4381404), (6, 3651170), (10, 2190702), (12, 1825585), (15, 1460468), (20, 1095351), (30, 730234), (53, 413340), (60, 365117), (83, 263940), (106, 206670), (159, 137780), (166, 131970), (212, 103335), (249, 87980), (265, 82668), (318, 68890), (332, 65985), (415, 52788), (498, 43990), (530, 41334), (636, 34445), (795, 27556), (830, 26394), (996, 21995), (1060, 20667), (1245, 17596), (1590, 13778), (1660, 13197), (2490, 8798), (3180, 6889), (4399, 4980)]