19957160

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{283}}^1$

素因数の和:378

約数の個数: 64

約数和(自身を含む): 47234880

約数和(自身を除く): 27277720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 43, 82, 86, 164, 172, 205, 215, 283, 328, 344, 410, 430, 566, 820, 860, 1132, 1415, 1640, 1720, 1763, 2264, 2830, 3526, 5660, 7052, 8815, 11320, 11603, 12169, 14104, 17630, 23206, 24338, 35260, 46412, 48676, 58015, 60845, 70520, 92824, 97352, 116030, 121690, 232060, 243380, 464120, 486760, 498929, 997858, 1995716, 2494645, 3991432, 4989290, 9978580, 19957160]

約数ペア:

[(1, 19957160), (2, 9978580), (4, 4989290), (5, 3991432), (8, 2494645), (10, 1995716), (20, 997858), (40, 498929), (41, 486760), (43, 464120), (82, 243380), (86, 232060), (164, 121690), (172, 116030), (205, 97352), (215, 92824), (283, 70520), (328, 60845), (344, 58015), (410, 48676), (430, 46412), (566, 35260), (820, 24338), (860, 23206), (1132, 17630), (1415, 14104), (1640, 12169), (1720, 11603), (1763, 11320), (2264, 8815), (2830, 7052), (3526, 5660)]