20482720

素因数分解:

$2^5\times 5^1\times {\mathrm{313}}^1\times {\mathrm{409}}^1$

素因数の和:737

約数の個数: 48

約数和(自身を含む): 48663720

約数和(自身を除く): 28181000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 313, 409, 626, 818, 1252, 1565, 1636, 2045, 2504, 3130, 3272, 4090, 5008, 6260, 6544, 8180, 10016, 12520, 13088, 16360, 25040, 32720, 50080, 65440, 128017, 256034, 512068, 640085, 1024136, 1280170, 2048272, 2560340, 4096544, 5120680, 10241360, 20482720]

約数ペア:

[(1, 20482720), (2, 10241360), (4, 5120680), (5, 4096544), (8, 2560340), (10, 2048272), (16, 1280170), (20, 1024136), (32, 640085), (40, 512068), (80, 256034), (160, 128017), (313, 65440), (409, 50080), (626, 32720), (818, 25040), (1252, 16360), (1565, 13088), (1636, 12520), (2045, 10016), (2504, 8180), (3130, 6544), (3272, 6260), (4090, 5008)]