21387654

素因数分解:

$2^1\times 3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2719}}^1$

素因数の和:2769

約数の個数: 48

約数和(自身を含む): 50918400

約数和(自身を除く): 29530746

約数列:

[1, 2, 3, 6, 9, 18, 19, 23, 38, 46, 57, 69, 114, 138, 171, 207, 342, 414, 437, 874, 1311, 2622, 2719, 3933, 5438, 7866, 8157, 16314, 24471, 48942, 51661, 62537, 103322, 125074, 154983, 187611, 309966, 375222, 464949, 562833, 929898, 1125666, 1188203, 2376406, 3564609, 7129218, 10693827, 21387654]

約数ペア:

[(1, 21387654), (2, 10693827), (3, 7129218), (6, 3564609), (9, 2376406), (18, 1188203), (19, 1125666), (23, 929898), (38, 562833), (46, 464949), (57, 375222), (69, 309966), (114, 187611), (138, 154983), (171, 125074), (207, 103322), (342, 62537), (414, 51661), (437, 48942), (874, 24471), (1311, 16314), (2622, 8157), (2719, 7866), (3933, 5438)]