21536120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{659}}^1$

素因数の和:732

約数の個数: 64

約数和(自身を含む): 52272000

約数和(自身を除く): 30735880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 86, 95, 152, 172, 190, 215, 344, 380, 430, 659, 760, 817, 860, 1318, 1634, 1720, 2636, 3268, 3295, 4085, 5272, 6536, 6590, 8170, 12521, 13180, 16340, 25042, 26360, 28337, 32680, 50084, 56674, 62605, 100168, 113348, 125210, 141685, 226696, 250420, 283370, 500840, 538403, 566740, 1076806, 1133480, 2153612, 2692015, 4307224, 5384030, 10768060, 21536120]

約数ペア:

[(1, 21536120), (2, 10768060), (4, 5384030), (5, 4307224), (8, 2692015), (10, 2153612), (19, 1133480), (20, 1076806), (38, 566740), (40, 538403), (43, 500840), (76, 283370), (86, 250420), (95, 226696), (152, 141685), (172, 125210), (190, 113348), (215, 100168), (344, 62605), (380, 56674), (430, 50084), (659, 32680), (760, 28337), (817, 26360), (860, 25042), (1318, 16340), (1634, 13180), (1720, 12521), (2636, 8170), (3268, 6590), (3295, 6536), (4085, 5272)]