20517615

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 16547985

約数列:

[1, 3, 5, 9, 15, 45, 47, 89, 109, 141, 235, 267, 327, 423, 445, 545, 705, 801, 981, 1335, 1635, 2115, 4005, 4183, 4905, 5123, 9701, 12549, 15369, 20915, 25615, 29103, 37647, 46107, 48505, 62745, 76845, 87309, 145515, 188235, 230535, 436545, 455947, 1367841, 2279735, 4103523, 6839205, 20517615]

約数ペア:

[(1, 20517615), (3, 6839205), (5, 4103523), (9, 2279735), (15, 1367841), (45, 455947), (47, 436545), (89, 230535), (109, 188235), (141, 145515), (235, 87309), (267, 76845), (327, 62745), (423, 48505), (445, 46107), (545, 37647), (705, 29103), (801, 25615), (981, 20915), (1335, 15369), (1635, 12549), (2115, 9701), (4005, 5123), (4183, 4905)]