21644720

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6599}}^1$

素因数の和:6653

約数の個数: 40

約数和(自身を含む): 51559200

約数和(自身を除く): 29914480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6599, 13198, 26396, 32995, 52792, 65990, 105584, 131980, 263960, 270559, 527920, 541118, 1082236, 1352795, 2164472, 2705590, 4328944, 5411180, 10822360, 21644720]

約数ペア:

[(1, 21644720), (2, 10822360), (4, 5411180), (5, 4328944), (8, 2705590), (10, 2164472), (16, 1352795), (20, 1082236), (40, 541118), (41, 527920), (80, 270559), (82, 263960), (164, 131980), (205, 105584), (328, 65990), (410, 52792), (656, 32995), (820, 26396), (1640, 13198), (3280, 6599)]