721000400

素因数分解:

$2^4\times 5^2\times {\mathrm{67}}^1\times {\mathrm{26903}}^1$

素因数の和:26988

約数の個数: 60

約数和(自身を含む): 1758122592

約数和(自身を除く): 1037122192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 67, 80, 100, 134, 200, 268, 335, 400, 536, 670, 1072, 1340, 1675, 2680, 3350, 5360, 6700, 13400, 26800, 26903, 53806, 107612, 134515, 215224, 269030, 430448, 538060, 672575, 1076120, 1345150, 1802501, 2152240, 2690300, 3605002, 5380600, 7210004, 9012505, 10761200, 14420008, 18025010, 28840016, 36050020, 45062525, 72100040, 90125050, 144200080, 180250100, 360500200, 721000400]

約数ペア:

[(1, 721000400), (2, 360500200), (4, 180250100), (5, 144200080), (8, 90125050), (10, 72100040), (16, 45062525), (20, 36050020), (25, 28840016), (40, 18025010), (50, 14420008), (67, 10761200), (80, 9012505), (100, 7210004), (134, 5380600), (200, 3605002), (268, 2690300), (335, 2152240), (400, 1802501), (536, 1345150), (670, 1076120), (1072, 672575), (1340, 538060), (1675, 430448), (2680, 269030), (3350, 215224), (5360, 134515), (6700, 107612), (13400, 53806), (26800, 26903)]