20818240

素因数分解:

$2^6\times 5^1\times {\mathrm{67}}^1\times {\mathrm{971}}^1$

素因数の和:1055

約数の個数: 56

約数和(自身を含む): 50365152

約数和(自身を除く): 29546912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 134, 160, 268, 320, 335, 536, 670, 971, 1072, 1340, 1942, 2144, 2680, 3884, 4288, 4855, 5360, 7768, 9710, 10720, 15536, 19420, 21440, 31072, 38840, 62144, 65057, 77680, 130114, 155360, 260228, 310720, 325285, 520456, 650570, 1040912, 1301140, 2081824, 2602280, 4163648, 5204560, 10409120, 20818240]

約数ペア:

[(1, 20818240), (2, 10409120), (4, 5204560), (5, 4163648), (8, 2602280), (10, 2081824), (16, 1301140), (20, 1040912), (32, 650570), (40, 520456), (64, 325285), (67, 310720), (80, 260228), (134, 155360), (160, 130114), (268, 77680), (320, 65057), (335, 62144), (536, 38840), (670, 31072), (971, 21440), (1072, 19420), (1340, 15536), (1942, 10720), (2144, 9710), (2680, 7768), (3884, 5360), (4288, 4855)]