21397360

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{401}}^1$

素因数の和:466

約数の個数: 80

約数和(自身を含む): 53835840

約数和(自身を除く): 32438480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 29, 40, 46, 58, 80, 92, 115, 116, 145, 184, 230, 232, 290, 368, 401, 460, 464, 580, 667, 802, 920, 1160, 1334, 1604, 1840, 2005, 2320, 2668, 3208, 3335, 4010, 5336, 6416, 6670, 8020, 9223, 10672, 11629, 13340, 16040, 18446, 23258, 26680, 32080, 36892, 46115, 46516, 53360, 58145, 73784, 92230, 93032, 116290, 147568, 184460, 186064, 232580, 267467, 368920, 465160, 534934, 737840, 930320, 1069868, 1337335, 2139736, 2674670, 4279472, 5349340, 10698680, 21397360]

約数ペア:

[(1, 21397360), (2, 10698680), (4, 5349340), (5, 4279472), (8, 2674670), (10, 2139736), (16, 1337335), (20, 1069868), (23, 930320), (29, 737840), (40, 534934), (46, 465160), (58, 368920), (80, 267467), (92, 232580), (115, 186064), (116, 184460), (145, 147568), (184, 116290), (230, 93032), (232, 92230), (290, 73784), (368, 58145), (401, 53360), (460, 46516), (464, 46115), (580, 36892), (667, 32080), (802, 26680), (920, 23258), (1160, 18446), (1334, 16040), (1604, 13340), (1840, 11629), (2005, 10672), (2320, 9223), (2668, 8020), (3208, 6670), (3335, 6416), (4010, 5336)]