20738720

素因数分解:

$2^5\times 5^1\times {\mathrm{227}}^1\times {\mathrm{571}}^1$

素因数の和:813

約数の個数: 48

約数和(自身を含む): 49297248

約数和(自身を除く): 28558528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 227, 454, 571, 908, 1135, 1142, 1816, 2270, 2284, 2855, 3632, 4540, 4568, 5710, 7264, 9080, 9136, 11420, 18160, 18272, 22840, 36320, 45680, 91360, 129617, 259234, 518468, 648085, 1036936, 1296170, 2073872, 2592340, 4147744, 5184680, 10369360, 20738720]

約数ペア:

[(1, 20738720), (2, 10369360), (4, 5184680), (5, 4147744), (8, 2592340), (10, 2073872), (16, 1296170), (20, 1036936), (32, 648085), (40, 518468), (80, 259234), (160, 129617), (227, 91360), (454, 45680), (571, 36320), (908, 22840), (1135, 18272), (1142, 18160), (1816, 11420), (2270, 9136), (2284, 9080), (2855, 7264), (3632, 5710), (4540, 4568)]