18209720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{439}}^1$

素因数の和:528

約数の個数: 64

約数和(自身を含む): 44193600

約数和(自身を除く): 25983880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 61, 68, 85, 122, 136, 170, 244, 305, 340, 439, 488, 610, 680, 878, 1037, 1220, 1756, 2074, 2195, 2440, 3512, 4148, 4390, 5185, 7463, 8296, 8780, 10370, 14926, 17560, 20740, 26779, 29852, 37315, 41480, 53558, 59704, 74630, 107116, 133895, 149260, 214232, 267790, 298520, 455243, 535580, 910486, 1071160, 1820972, 2276215, 3641944, 4552430, 9104860, 18209720]

約数ペア:

[(1, 18209720), (2, 9104860), (4, 4552430), (5, 3641944), (8, 2276215), (10, 1820972), (17, 1071160), (20, 910486), (34, 535580), (40, 455243), (61, 298520), (68, 267790), (85, 214232), (122, 149260), (136, 133895), (170, 107116), (244, 74630), (305, 59704), (340, 53558), (439, 41480), (488, 37315), (610, 29852), (680, 26779), (878, 20740), (1037, 17560), (1220, 14926), (1756, 10370), (2074, 8780), (2195, 8296), (2440, 7463), (3512, 5185), (4148, 4390)]