21538320

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{5279}}^1$

素因数の和:5312

約数の個数: 80

約数和(自身を含む): 70709760

約数和(自身を除く): 49171440

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 68, 80, 85, 102, 120, 136, 170, 204, 240, 255, 272, 340, 408, 510, 680, 816, 1020, 1360, 2040, 4080, 5279, 10558, 15837, 21116, 26395, 31674, 42232, 52790, 63348, 79185, 84464, 89743, 105580, 126696, 158370, 179486, 211160, 253392, 269229, 316740, 358972, 422320, 448715, 538458, 633480, 717944, 897430, 1076916, 1266960, 1346145, 1435888, 1794860, 2153832, 2692290, 3589720, 4307664, 5384580, 7179440, 10769160, 21538320]

約数ペア:

[(1, 21538320), (2, 10769160), (3, 7179440), (4, 5384580), (5, 4307664), (6, 3589720), (8, 2692290), (10, 2153832), (12, 1794860), (15, 1435888), (16, 1346145), (17, 1266960), (20, 1076916), (24, 897430), (30, 717944), (34, 633480), (40, 538458), (48, 448715), (51, 422320), (60, 358972), (68, 316740), (80, 269229), (85, 253392), (102, 211160), (120, 179486), (136, 158370), (170, 126696), (204, 105580), (240, 89743), (255, 84464), (272, 79185), (340, 63348), (408, 52790), (510, 42232), (680, 31674), (816, 26395), (1020, 21116), (1360, 15837), (2040, 10558), (4080, 5279)]