18781280

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{409}}^1$

素因数の和:472

約数の個数: 96

約数和(自身を含む): 52073280

約数和(自身を除く): 33292000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 41, 56, 70, 80, 82, 112, 140, 160, 164, 205, 224, 280, 287, 328, 409, 410, 560, 574, 656, 818, 820, 1120, 1148, 1312, 1435, 1636, 1640, 2045, 2296, 2863, 2870, 3272, 3280, 4090, 4592, 5726, 5740, 6544, 6560, 8180, 9184, 11452, 11480, 13088, 14315, 16360, 16769, 22904, 22960, 28630, 32720, 33538, 45808, 45920, 57260, 65440, 67076, 83845, 91616, 114520, 117383, 134152, 167690, 229040, 234766, 268304, 335380, 458080, 469532, 536608, 586915, 670760, 939064, 1173830, 1341520, 1878128, 2347660, 2683040, 3756256, 4695320, 9390640, 18781280]

約数ペア:

[(1, 18781280), (2, 9390640), (4, 4695320), (5, 3756256), (7, 2683040), (8, 2347660), (10, 1878128), (14, 1341520), (16, 1173830), (20, 939064), (28, 670760), (32, 586915), (35, 536608), (40, 469532), (41, 458080), (56, 335380), (70, 268304), (80, 234766), (82, 229040), (112, 167690), (140, 134152), (160, 117383), (164, 114520), (205, 91616), (224, 83845), (280, 67076), (287, 65440), (328, 57260), (409, 45920), (410, 45808), (560, 33538), (574, 32720), (656, 28630), (818, 22960), (820, 22904), (1120, 16769), (1148, 16360), (1312, 14315), (1435, 13088), (1636, 11480), (1640, 11452), (2045, 9184), (2296, 8180), (2863, 6560), (2870, 6544), (3272, 5740), (3280, 5726), (4090, 4592)]