21401440

素因数分解:

$2^5\times 5^1\times {\mathrm{181}}^1\times {\mathrm{739}}^1$

素因数の和:935

約数の個数: 48

約数和(自身を含む): 50909040

約数和(自身を除く): 29507600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 181, 362, 724, 739, 905, 1448, 1478, 1810, 2896, 2956, 3620, 3695, 5792, 5912, 7240, 7390, 11824, 14480, 14780, 23648, 28960, 29560, 59120, 118240, 133759, 267518, 535036, 668795, 1070072, 1337590, 2140144, 2675180, 4280288, 5350360, 10700720, 21401440]

約数ペア:

[(1, 21401440), (2, 10700720), (4, 5350360), (5, 4280288), (8, 2675180), (10, 2140144), (16, 1337590), (20, 1070072), (32, 668795), (40, 535036), (80, 267518), (160, 133759), (181, 118240), (362, 59120), (724, 29560), (739, 28960), (905, 23648), (1448, 14780), (1478, 14480), (1810, 11824), (2896, 7390), (2956, 7240), (3620, 5912), (3695, 5792)]