20736555

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{317}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 39152160

約数和(自身を除く): 18415605

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 89, 105, 147, 245, 267, 317, 445, 623, 735, 951, 1335, 1585, 1869, 2219, 3115, 4361, 4755, 6657, 9345, 11095, 13083, 15533, 21805, 28213, 33285, 46599, 65415, 77665, 84639, 141065, 197491, 232995, 423195, 592473, 987455, 1382437, 2962365, 4147311, 6912185, 20736555]

約数ペア:

[(1, 20736555), (3, 6912185), (5, 4147311), (7, 2962365), (15, 1382437), (21, 987455), (35, 592473), (49, 423195), (89, 232995), (105, 197491), (147, 141065), (245, 84639), (267, 77665), (317, 65415), (445, 46599), (623, 33285), (735, 28213), (951, 21805), (1335, 15533), (1585, 13083), (1869, 11095), (2219, 9345), (3115, 6657), (4361, 4755)]