20779388

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{281}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 44217600

約数和(自身を除く): 23438212

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 139, 266, 278, 281, 532, 556, 562, 973, 1124, 1946, 1967, 2641, 3892, 3934, 5282, 5339, 7868, 10564, 10678, 18487, 21356, 36974, 37373, 39059, 73948, 74746, 78118, 149492, 156236, 273413, 546826, 742121, 1093652, 1484242, 2968484, 5194847, 10389694, 20779388]

約数ペア:

[(1, 20779388), (2, 10389694), (4, 5194847), (7, 2968484), (14, 1484242), (19, 1093652), (28, 742121), (38, 546826), (76, 273413), (133, 156236), (139, 149492), (266, 78118), (278, 74746), (281, 73948), (532, 39059), (556, 37373), (562, 36974), (973, 21356), (1124, 18487), (1946, 10678), (1967, 10564), (2641, 7868), (3892, 5339), (3934, 5282)]