18778000

素因数分解:

$2^4\times 5^3\times {\mathrm{41}}^1\times {\mathrm{229}}^1$

素因数の和:293

約数の個数: 80

約数和(自身を含む): 46715760

約数和(自身を除く): 27937760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 125, 164, 200, 205, 229, 250, 328, 400, 410, 458, 500, 656, 820, 916, 1000, 1025, 1145, 1640, 1832, 2000, 2050, 2290, 3280, 3664, 4100, 4580, 5125, 5725, 8200, 9160, 9389, 10250, 11450, 16400, 18320, 18778, 20500, 22900, 28625, 37556, 41000, 45800, 46945, 57250, 75112, 82000, 91600, 93890, 114500, 150224, 187780, 229000, 234725, 375560, 458000, 469450, 751120, 938900, 1173625, 1877800, 2347250, 3755600, 4694500, 9389000, 18778000]

約数ペア:

[(1, 18778000), (2, 9389000), (4, 4694500), (5, 3755600), (8, 2347250), (10, 1877800), (16, 1173625), (20, 938900), (25, 751120), (40, 469450), (41, 458000), (50, 375560), (80, 234725), (82, 229000), (100, 187780), (125, 150224), (164, 114500), (200, 93890), (205, 91600), (229, 82000), (250, 75112), (328, 57250), (400, 46945), (410, 45800), (458, 41000), (500, 37556), (656, 28625), (820, 22900), (916, 20500), (1000, 18778), (1025, 18320), (1145, 16400), (1640, 11450), (1832, 10250), (2000, 9389), (2050, 9160), (2290, 8200), (3280, 5725), (3664, 5125), (4100, 4580)]