21590520

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25703}}^1$

素因数の和:25724

約数の個数: 64

約数和(自身を含む): 74027520

約数和(自身を除く): 52437000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25703, 51406, 77109, 102812, 128515, 154218, 179921, 205624, 257030, 308436, 359842, 385545, 514060, 539763, 616872, 719684, 771090, 899605, 1028120, 1079526, 1439368, 1542180, 1799210, 2159052, 2698815, 3084360, 3598420, 4318104, 5397630, 7196840, 10795260, 21590520]

約数ペア:

[(1, 21590520), (2, 10795260), (3, 7196840), (4, 5397630), (5, 4318104), (6, 3598420), (7, 3084360), (8, 2698815), (10, 2159052), (12, 1799210), (14, 1542180), (15, 1439368), (20, 1079526), (21, 1028120), (24, 899605), (28, 771090), (30, 719684), (35, 616872), (40, 539763), (42, 514060), (56, 385545), (60, 359842), (70, 308436), (84, 257030), (105, 205624), (120, 179921), (140, 154218), (168, 128515), (210, 102812), (280, 77109), (420, 51406), (840, 25703)]