81930880

素因数分解:

$2^7\times 5^1\times {\mathrm{313}}^1\times {\mathrm{409}}^1$

素因数の和:741

約数の個数: 64

約数和(自身を含む): 196972200

約数和(自身を除く): 115041320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 313, 320, 409, 626, 640, 818, 1252, 1565, 1636, 2045, 2504, 3130, 3272, 4090, 5008, 6260, 6544, 8180, 10016, 12520, 13088, 16360, 20032, 25040, 26176, 32720, 40064, 50080, 52352, 65440, 100160, 128017, 130880, 200320, 256034, 261760, 512068, 640085, 1024136, 1280170, 2048272, 2560340, 4096544, 5120680, 8193088, 10241360, 16386176, 20482720, 40965440, 81930880]

約数ペア:

[(1, 81930880), (2, 40965440), (4, 20482720), (5, 16386176), (8, 10241360), (10, 8193088), (16, 5120680), (20, 4096544), (32, 2560340), (40, 2048272), (64, 1280170), (80, 1024136), (128, 640085), (160, 512068), (313, 261760), (320, 256034), (409, 200320), (626, 130880), (640, 128017), (818, 100160), (1252, 65440), (1565, 52352), (1636, 50080), (2045, 40064), (2504, 32720), (3130, 26176), (3272, 25040), (4090, 20032), (5008, 16360), (6260, 13088), (6544, 12520), (8180, 10016)]