21389740

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1187}}^1$

素因数の和:1266

約数の個数: 48

約数和(自身を含む): 48498912

約数和(自身を除く): 27109172

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 53, 68, 85, 106, 170, 212, 265, 340, 530, 901, 1060, 1187, 1802, 2374, 3604, 4505, 4748, 5935, 9010, 11870, 18020, 20179, 23740, 40358, 62911, 80716, 100895, 125822, 201790, 251644, 314555, 403580, 629110, 1069487, 1258220, 2138974, 4277948, 5347435, 10694870, 21389740]

約数ペア:

[(1, 21389740), (2, 10694870), (4, 5347435), (5, 4277948), (10, 2138974), (17, 1258220), (20, 1069487), (34, 629110), (53, 403580), (68, 314555), (85, 251644), (106, 201790), (170, 125822), (212, 100895), (265, 80716), (340, 62911), (530, 40358), (901, 23740), (1060, 20179), (1187, 18020), (1802, 11870), (2374, 9010), (3604, 5935), (4505, 4748)]