19788705

素因数分解:

$3^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:173

約数の個数: 56

約数和(自身を含む): 36593640

約数和(自身を除く): 16804935

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 81, 89, 135, 183, 243, 267, 305, 405, 445, 549, 729, 801, 915, 1215, 1335, 1647, 2403, 2745, 3645, 4005, 4941, 5429, 7209, 8235, 12015, 14823, 16287, 21627, 24705, 27145, 36045, 44469, 48861, 64881, 74115, 81435, 108135, 146583, 222345, 244305, 324405, 439749, 732915, 1319247, 2198745, 3957741, 6596235, 19788705]

約数ペア:

[(1, 19788705), (3, 6596235), (5, 3957741), (9, 2198745), (15, 1319247), (27, 732915), (45, 439749), (61, 324405), (81, 244305), (89, 222345), (135, 146583), (183, 108135), (243, 81435), (267, 74115), (305, 64881), (405, 48861), (445, 44469), (549, 36045), (729, 27145), (801, 24705), (915, 21627), (1215, 16287), (1335, 14823), (1647, 12015), (2403, 8235), (2745, 7209), (3645, 5429), (4005, 4941)]