21197920

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^2\times {\mathrm{367}}^1$

素因数の和:420

約数の個数: 72

約数和(自身を含む): 52998624

約数和(自身を除く): 31800704

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 361, 367, 380, 608, 722, 734, 760, 1444, 1468, 1520, 1805, 1835, 2888, 2936, 3040, 3610, 3670, 5776, 5872, 6973, 7220, 7340, 11552, 11744, 13946, 14440, 14680, 27892, 28880, 29360, 34865, 55784, 57760, 58720, 69730, 111568, 132487, 139460, 223136, 264974, 278920, 529948, 557840, 662435, 1059896, 1115680, 1324870, 2119792, 2649740, 4239584, 5299480, 10598960, 21197920]

約数ペア:

[(1, 21197920), (2, 10598960), (4, 5299480), (5, 4239584), (8, 2649740), (10, 2119792), (16, 1324870), (19, 1115680), (20, 1059896), (32, 662435), (38, 557840), (40, 529948), (76, 278920), (80, 264974), (95, 223136), (152, 139460), (160, 132487), (190, 111568), (304, 69730), (361, 58720), (367, 57760), (380, 55784), (608, 34865), (722, 29360), (734, 28880), (760, 27892), (1444, 14680), (1468, 14440), (1520, 13946), (1805, 11744), (1835, 11552), (2888, 7340), (2936, 7220), (3040, 6973), (3610, 5872), (3670, 5776)]