21612440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{859}}^1$

素因数の和:924

約数の個数: 64

約数和(自身を含む): 52941600

約数和(自身を除く): 31329160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 37, 40, 68, 74, 85, 136, 148, 170, 185, 296, 340, 370, 629, 680, 740, 859, 1258, 1480, 1718, 2516, 3145, 3436, 4295, 5032, 6290, 6872, 8590, 12580, 14603, 17180, 25160, 29206, 31783, 34360, 58412, 63566, 73015, 116824, 127132, 146030, 158915, 254264, 292060, 317830, 540311, 584120, 635660, 1080622, 1271320, 2161244, 2701555, 4322488, 5403110, 10806220, 21612440]

約数ペア:

[(1, 21612440), (2, 10806220), (4, 5403110), (5, 4322488), (8, 2701555), (10, 2161244), (17, 1271320), (20, 1080622), (34, 635660), (37, 584120), (40, 540311), (68, 317830), (74, 292060), (85, 254264), (136, 158915), (148, 146030), (170, 127132), (185, 116824), (296, 73015), (340, 63566), (370, 58412), (629, 34360), (680, 31783), (740, 29206), (859, 25160), (1258, 17180), (1480, 14603), (1718, 12580), (2516, 8590), (3145, 6872), (3436, 6290), (4295, 5032)]