21887720

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{643}}^1$

素因数の和:714

約数の個数: 64

約数和(自身を含む): 52859520

約数和(自身を除く): 30971800

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 37, 40, 46, 74, 92, 115, 148, 184, 185, 230, 296, 370, 460, 643, 740, 851, 920, 1286, 1480, 1702, 2572, 3215, 3404, 4255, 5144, 6430, 6808, 8510, 12860, 14789, 17020, 23791, 25720, 29578, 34040, 47582, 59156, 73945, 95164, 118312, 118955, 147890, 190328, 237910, 295780, 475820, 547193, 591560, 951640, 1094386, 2188772, 2735965, 4377544, 5471930, 10943860, 21887720]

約数ペア:

[(1, 21887720), (2, 10943860), (4, 5471930), (5, 4377544), (8, 2735965), (10, 2188772), (20, 1094386), (23, 951640), (37, 591560), (40, 547193), (46, 475820), (74, 295780), (92, 237910), (115, 190328), (148, 147890), (184, 118955), (185, 118312), (230, 95164), (296, 73945), (370, 59156), (460, 47582), (643, 34040), (740, 29578), (851, 25720), (920, 23791), (1286, 17020), (1480, 14789), (1702, 12860), (2572, 8510), (3215, 6808), (3404, 6430), (4255, 5144)]