19997390

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{1103}}^1$

素因数の和:1161

約数の個数: 48

約数和(自身を含む): 43042752

約数和(自身を除く): 23045362

約数列:

[1, 2, 5, 7, 10, 14, 35, 37, 49, 70, 74, 98, 185, 245, 259, 370, 490, 518, 1103, 1295, 1813, 2206, 2590, 3626, 5515, 7721, 9065, 11030, 15442, 18130, 38605, 40811, 54047, 77210, 81622, 108094, 204055, 270235, 285677, 408110, 540470, 571354, 1428385, 1999739, 2856770, 3999478, 9998695, 19997390]

約数ペア:

[(1, 19997390), (2, 9998695), (5, 3999478), (7, 2856770), (10, 1999739), (14, 1428385), (35, 571354), (37, 540470), (49, 408110), (70, 285677), (74, 270235), (98, 204055), (185, 108094), (245, 81622), (259, 77210), (370, 54047), (490, 40811), (518, 38605), (1103, 18130), (1295, 15442), (1813, 11030), (2206, 9065), (2590, 7721), (3626, 5515)]