21278348

素因数分解:

$2^2\times 7^3\times {\mathrm{13}}^1\times {\mathrm{1193}}^1$

素因数の和:1231

約数の個数: 48

約数和(自身を含む): 46804800

約数和(自身を除く): 25526452

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 91, 98, 182, 196, 343, 364, 637, 686, 1193, 1274, 1372, 2386, 2548, 4459, 4772, 8351, 8918, 15509, 16702, 17836, 31018, 33404, 58457, 62036, 108563, 116914, 217126, 233828, 409199, 434252, 759941, 818398, 1519882, 1636796, 3039764, 5319587, 10639174, 21278348]

約数ペア:

[(1, 21278348), (2, 10639174), (4, 5319587), (7, 3039764), (13, 1636796), (14, 1519882), (26, 818398), (28, 759941), (49, 434252), (52, 409199), (91, 233828), (98, 217126), (182, 116914), (196, 108563), (343, 62036), (364, 58457), (637, 33404), (686, 31018), (1193, 17836), (1274, 16702), (1372, 15509), (2386, 8918), (2548, 8351), (4459, 4772)]