164020640

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{20921}}^1$

素因数の和:20950

約数の個数: 72

約数和(自身を含む): 450785412

約数和(自身を除く): 286764772

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 3920, 7840, 20921, 41842, 83684, 104605, 146447, 167368, 209210, 292894, 334736, 418420, 585788, 669472, 732235, 836840, 1025129, 1171576, 1464470, 1673680, 2050258, 2343152, 2928940, 3347360, 4100516, 4686304, 5125645, 5857880, 8201032, 10251290, 11715760, 16402064, 20502580, 23431520, 32804128, 41005160, 82010320, 164020640]

約数ペア:

[(1, 164020640), (2, 82010320), (4, 41005160), (5, 32804128), (7, 23431520), (8, 20502580), (10, 16402064), (14, 11715760), (16, 10251290), (20, 8201032), (28, 5857880), (32, 5125645), (35, 4686304), (40, 4100516), (49, 3347360), (56, 2928940), (70, 2343152), (80, 2050258), (98, 1673680), (112, 1464470), (140, 1171576), (160, 1025129), (196, 836840), (224, 732235), (245, 669472), (280, 585788), (392, 418420), (490, 334736), (560, 292894), (784, 209210), (980, 167368), (1120, 146447), (1568, 104605), (1960, 83684), (3920, 41842), (7840, 20921)]