21571810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:307

約数の個数: 64

約数和(自身を含む): 45505152

約数和(自身を除く): 23933342

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 43, 65, 85, 86, 130, 170, 215, 221, 227, 430, 442, 454, 559, 731, 1105, 1118, 1135, 1462, 2210, 2270, 2795, 2951, 3655, 3859, 5590, 5902, 7310, 7718, 9503, 9761, 14755, 19006, 19295, 19522, 29510, 38590, 47515, 48805, 50167, 95030, 97610, 100334, 126893, 165937, 250835, 253786, 331874, 501670, 634465, 829685, 1268930, 1659370, 2157181, 4314362, 10785905, 21571810]

約数ペア:

[(1, 21571810), (2, 10785905), (5, 4314362), (10, 2157181), (13, 1659370), (17, 1268930), (26, 829685), (34, 634465), (43, 501670), (65, 331874), (85, 253786), (86, 250835), (130, 165937), (170, 126893), (215, 100334), (221, 97610), (227, 95030), (430, 50167), (442, 48805), (454, 47515), (559, 38590), (731, 29510), (1105, 19522), (1118, 19295), (1135, 19006), (1462, 14755), (2210, 9761), (2270, 9503), (2795, 7718), (2951, 7310), (3655, 5902), (3859, 5590)]