18821908

素因数分解:

$2^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 38993920

約数和(自身を除く): 20172012

約数列:

[1, 2, 4, 7, 14, 28, 67, 79, 127, 134, 158, 254, 268, 316, 469, 508, 553, 889, 938, 1106, 1778, 1876, 2212, 3556, 5293, 8509, 10033, 10586, 17018, 20066, 21172, 34036, 37051, 40132, 59563, 70231, 74102, 119126, 140462, 148204, 238252, 280924, 672211, 1344422, 2688844, 4705477, 9410954, 18821908]

約数ペア:

[(1, 18821908), (2, 9410954), (4, 4705477), (7, 2688844), (14, 1344422), (28, 672211), (67, 280924), (79, 238252), (127, 148204), (134, 140462), (158, 119126), (254, 74102), (268, 70231), (316, 59563), (469, 40132), (508, 37051), (553, 34036), (889, 21172), (938, 20066), (1106, 17018), (1778, 10586), (1876, 10033), (2212, 8509), (3556, 5293)]