21891040

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^2\times {\mathrm{379}}^1$

素因数の和:432

約数の個数: 72

約数和(自身を含む): 54726840

約数和(自身を除く): 32835800

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 361, 379, 380, 608, 722, 758, 760, 1444, 1516, 1520, 1805, 1895, 2888, 3032, 3040, 3610, 3790, 5776, 6064, 7201, 7220, 7580, 11552, 12128, 14402, 14440, 15160, 28804, 28880, 30320, 36005, 57608, 57760, 60640, 72010, 115216, 136819, 144020, 230432, 273638, 288040, 547276, 576080, 684095, 1094552, 1152160, 1368190, 2189104, 2736380, 4378208, 5472760, 10945520, 21891040]

約数ペア:

[(1, 21891040), (2, 10945520), (4, 5472760), (5, 4378208), (8, 2736380), (10, 2189104), (16, 1368190), (19, 1152160), (20, 1094552), (32, 684095), (38, 576080), (40, 547276), (76, 288040), (80, 273638), (95, 230432), (152, 144020), (160, 136819), (190, 115216), (304, 72010), (361, 60640), (379, 57760), (380, 57608), (608, 36005), (722, 30320), (758, 28880), (760, 28804), (1444, 15160), (1516, 14440), (1520, 14402), (1805, 12128), (1895, 11552), (2888, 7580), (3032, 7220), (3040, 7201), (3610, 6064), (3790, 5776)]