31506760

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{173}}^1$

素因数の和:370

約数の個数: 64

約数和(自身を含む): 74228400

約数和(自身を除く): 42721640

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 157, 173, 232, 290, 314, 346, 580, 628, 692, 785, 865, 1160, 1256, 1384, 1570, 1730, 3140, 3460, 4553, 5017, 6280, 6920, 9106, 10034, 18212, 20068, 22765, 25085, 27161, 36424, 40136, 45530, 50170, 54322, 91060, 100340, 108644, 135805, 182120, 200680, 217288, 271610, 543220, 787669, 1086440, 1575338, 3150676, 3938345, 6301352, 7876690, 15753380, 31506760]

約数ペア:

[(1, 31506760), (2, 15753380), (4, 7876690), (5, 6301352), (8, 3938345), (10, 3150676), (20, 1575338), (29, 1086440), (40, 787669), (58, 543220), (116, 271610), (145, 217288), (157, 200680), (173, 182120), (232, 135805), (290, 108644), (314, 100340), (346, 91060), (580, 54322), (628, 50170), (692, 45530), (785, 40136), (865, 36424), (1160, 27161), (1256, 25085), (1384, 22765), (1570, 20068), (1730, 18212), (3140, 10034), (3460, 9106), (4553, 6920), (5017, 6280)]