21407320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4423}}^1$

素因数の和:4456

約数の個数: 48

約数和(自身を含む): 52955280

約数和(自身を除く): 31547960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4423, 4840, 8846, 17692, 22115, 35384, 44230, 48653, 88460, 97306, 176920, 194612, 243265, 389224, 486530, 535183, 973060, 1070366, 1946120, 2140732, 2675915, 4281464, 5351830, 10703660, 21407320]

約数ペア:

[(1, 21407320), (2, 10703660), (4, 5351830), (5, 4281464), (8, 2675915), (10, 2140732), (11, 1946120), (20, 1070366), (22, 973060), (40, 535183), (44, 486530), (55, 389224), (88, 243265), (110, 194612), (121, 176920), (220, 97306), (242, 88460), (440, 48653), (484, 44230), (605, 35384), (968, 22115), (1210, 17692), (2420, 8846), (4423, 4840)]