19800812

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{83}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 38290560

約数和(自身を除く): 18489748

約数列:

[1, 2, 4, 19, 38, 43, 73, 76, 83, 86, 146, 166, 172, 292, 332, 817, 1387, 1577, 1634, 2774, 3139, 3154, 3268, 3569, 5548, 6059, 6278, 6308, 7138, 12118, 12556, 14276, 24236, 59641, 67811, 115121, 119282, 135622, 230242, 238564, 260537, 271244, 460484, 521074, 1042148, 4950203, 9900406, 19800812]

約数ペア:

[(1, 19800812), (2, 9900406), (4, 4950203), (19, 1042148), (38, 521074), (43, 460484), (73, 271244), (76, 260537), (83, 238564), (86, 230242), (146, 135622), (166, 119282), (172, 115121), (292, 67811), (332, 59641), (817, 24236), (1387, 14276), (1577, 12556), (1634, 12118), (2774, 7138), (3139, 6308), (3154, 6278), (3268, 6059), (3569, 5548)]