21609880

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{283}}^1$

素因数の和:400

約数の個数: 64

約数和(自身を含む): 51528960

約数和(自身を除く): 29919080

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 83, 92, 115, 166, 184, 230, 283, 332, 415, 460, 566, 664, 830, 920, 1132, 1415, 1660, 1909, 2264, 2830, 3320, 3818, 5660, 6509, 7636, 9545, 11320, 13018, 15272, 19090, 23489, 26036, 32545, 38180, 46978, 52072, 65090, 76360, 93956, 117445, 130180, 187912, 234890, 260360, 469780, 540247, 939560, 1080494, 2160988, 2701235, 4321976, 5402470, 10804940, 21609880]

約数ペア:

[(1, 21609880), (2, 10804940), (4, 5402470), (5, 4321976), (8, 2701235), (10, 2160988), (20, 1080494), (23, 939560), (40, 540247), (46, 469780), (83, 260360), (92, 234890), (115, 187912), (166, 130180), (184, 117445), (230, 93956), (283, 76360), (332, 65090), (415, 52072), (460, 46978), (566, 38180), (664, 32545), (830, 26036), (920, 23489), (1132, 19090), (1415, 15272), (1660, 13018), (1909, 11320), (2264, 9545), (2830, 7636), (3320, 6509), (3818, 5660)]