164870840

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{229}}^1\times {\mathrm{439}}^1$

素因数の和:720

約数の個数: 64

約数和(自身を含む): 382536000

約数和(自身を除く): 217665160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 229, 328, 410, 439, 458, 820, 878, 916, 1145, 1640, 1756, 1832, 2195, 2290, 3512, 4390, 4580, 8780, 9160, 9389, 17560, 17999, 18778, 35998, 37556, 46945, 71996, 75112, 89995, 93890, 100531, 143992, 179990, 187780, 201062, 359980, 375560, 402124, 502655, 719960, 804248, 1005310, 2010620, 4021240, 4121771, 8243542, 16487084, 20608855, 32974168, 41217710, 82435420, 164870840]

約数ペア:

[(1, 164870840), (2, 82435420), (4, 41217710), (5, 32974168), (8, 20608855), (10, 16487084), (20, 8243542), (40, 4121771), (41, 4021240), (82, 2010620), (164, 1005310), (205, 804248), (229, 719960), (328, 502655), (410, 402124), (439, 375560), (458, 359980), (820, 201062), (878, 187780), (916, 179990), (1145, 143992), (1640, 100531), (1756, 93890), (1832, 89995), (2195, 75112), (2290, 71996), (3512, 46945), (4390, 37556), (4580, 35998), (8780, 18778), (9160, 17999), (9389, 17560)]