21754720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10459}}^1$

素因数の和:10487

約数の個数: 48

約数和(自身を含む): 55354320

約数和(自身を除く): 33599600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10459, 20918, 41836, 52295, 83672, 104590, 135967, 167344, 209180, 271934, 334688, 418360, 543868, 679835, 836720, 1087736, 1359670, 1673440, 2175472, 2719340, 4350944, 5438680, 10877360, 21754720]

約数ペア:

[(1, 21754720), (2, 10877360), (4, 5438680), (5, 4350944), (8, 2719340), (10, 2175472), (13, 1673440), (16, 1359670), (20, 1087736), (26, 836720), (32, 679835), (40, 543868), (52, 418360), (65, 334688), (80, 271934), (104, 209180), (130, 167344), (160, 135967), (208, 104590), (260, 83672), (416, 52295), (520, 41836), (1040, 20918), (2080, 10459)]