20565209840

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{749461}}^1$

素因数の和:749495

約数の個数: 80

約数和(自身を含む): 55759972800

約数和(自身を除く): 35194762960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 490, 560, 686, 784, 980, 1372, 1715, 1960, 2744, 3430, 3920, 5488, 6860, 13720, 27440, 749461, 1498922, 2997844, 3747305, 5246227, 5995688, 7494610, 10492454, 11991376, 14989220, 20984908, 26231135, 29978440, 36723589, 41969816, 52462270, 59956880, 73447178, 83939632, 104924540, 146894356, 183617945, 209849080, 257065123, 293788712, 367235890, 419698160, 514130246, 587577424, 734471780, 1028260492, 1285325615, 1468943560, 2056520984, 2570651230, 2937887120, 4113041968, 5141302460, 10282604920, 20565209840]

約数ペア:

[(1, 20565209840), (2, 10282604920), (4, 5141302460), (5, 4113041968), (7, 2937887120), (8, 2570651230), (10, 2056520984), (14, 1468943560), (16, 1285325615), (20, 1028260492), (28, 734471780), (35, 587577424), (40, 514130246), (49, 419698160), (56, 367235890), (70, 293788712), (80, 257065123), (98, 209849080), (112, 183617945), (140, 146894356), (196, 104924540), (245, 83939632), (280, 73447178), (343, 59956880), (392, 52462270), (490, 41969816), (560, 36723589), (686, 29978440), (784, 26231135), (980, 20984908), (1372, 14989220), (1715, 11991376), (1960, 10492454), (2744, 7494610), (3430, 5995688), (3920, 5246227), (5488, 3747305), (6860, 2997844), (13720, 1498922), (27440, 749461)]