20997584

素因数分解:

$2^4\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{239}}^1$

素因数の和:300

約数の個数: 60

約数和(自身を含む): 45681600

約数和(自身を除く): 24684016

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 68, 76, 136, 152, 239, 272, 289, 304, 323, 478, 578, 646, 956, 1156, 1292, 1912, 2312, 2584, 3824, 4063, 4541, 4624, 5168, 5491, 8126, 9082, 10982, 16252, 18164, 21964, 32504, 36328, 43928, 65008, 69071, 72656, 77197, 87856, 138142, 154394, 276284, 308788, 552568, 617576, 1105136, 1235152, 1312349, 2624698, 5249396, 10498792, 20997584]

約数ペア:

[(1, 20997584), (2, 10498792), (4, 5249396), (8, 2624698), (16, 1312349), (17, 1235152), (19, 1105136), (34, 617576), (38, 552568), (68, 308788), (76, 276284), (136, 154394), (152, 138142), (239, 87856), (272, 77197), (289, 72656), (304, 69071), (323, 65008), (478, 43928), (578, 36328), (646, 32504), (956, 21964), (1156, 18164), (1292, 16252), (1912, 10982), (2312, 9082), (2584, 8126), (3824, 5491), (4063, 5168), (4541, 4624)]