21751520

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{19421}}^1$

素因数の和:19443

約数の個数: 48

約数和(自身を含む): 58732128

約数和(自身を除く): 36980608

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 19421, 38842, 77684, 97105, 135947, 155368, 194210, 271894, 310736, 388420, 543788, 621472, 679735, 776840, 1087576, 1359470, 1553680, 2175152, 2718940, 3107360, 4350304, 5437880, 10875760, 21751520]

約数ペア:

[(1, 21751520), (2, 10875760), (4, 5437880), (5, 4350304), (7, 3107360), (8, 2718940), (10, 2175152), (14, 1553680), (16, 1359470), (20, 1087576), (28, 776840), (32, 679735), (35, 621472), (40, 543788), (56, 388420), (70, 310736), (80, 271894), (112, 194210), (140, 155368), (160, 135947), (224, 97105), (280, 77684), (560, 38842), (1120, 19421)]