21259904

素因数分解:

$2^7\times {\mathrm{37}}^1\times {\mathrm{67}}^2$

素因数の和:185

約数の個数: 48

約数和(自身を含む): 44157330

約数和(自身を除く): 22897426

約数列:

[1, 2, 4, 8, 16, 32, 37, 64, 67, 74, 128, 134, 148, 268, 296, 536, 592, 1072, 1184, 2144, 2368, 2479, 4288, 4489, 4736, 4958, 8576, 8978, 9916, 17956, 19832, 35912, 39664, 71824, 79328, 143648, 158656, 166093, 287296, 317312, 332186, 574592, 664372, 1328744, 2657488, 5314976, 10629952, 21259904]

約数ペア:

[(1, 21259904), (2, 10629952), (4, 5314976), (8, 2657488), (16, 1328744), (32, 664372), (37, 574592), (64, 332186), (67, 317312), (74, 287296), (128, 166093), (134, 158656), (148, 143648), (268, 79328), (296, 71824), (536, 39664), (592, 35912), (1072, 19832), (1184, 17956), (2144, 9916), (2368, 8978), (2479, 8576), (4288, 4958), (4489, 4736)]