20897440

素因数分解:

$2^5\times 5^1\times {\mathrm{211}}^1\times {\mathrm{619}}^1$

素因数の和:845

約数の個数: 48

約数和(自身を含む): 49684320

約数和(自身を除く): 28786880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 211, 422, 619, 844, 1055, 1238, 1688, 2110, 2476, 3095, 3376, 4220, 4952, 6190, 6752, 8440, 9904, 12380, 16880, 19808, 24760, 33760, 49520, 99040, 130609, 261218, 522436, 653045, 1044872, 1306090, 2089744, 2612180, 4179488, 5224360, 10448720, 20897440]

約数ペア:

[(1, 20897440), (2, 10448720), (4, 5224360), (5, 4179488), (8, 2612180), (10, 2089744), (16, 1306090), (20, 1044872), (32, 653045), (40, 522436), (80, 261218), (160, 130609), (211, 99040), (422, 49520), (619, 33760), (844, 24760), (1055, 19808), (1238, 16880), (1688, 12380), (2110, 9904), (2476, 8440), (3095, 6752), (3376, 6190), (4220, 4952)]