21354760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1439}}^1$

素因数の和:1510

約数の個数: 64

約数和(自身を含む): 55987200

約数和(自身を除く): 34632440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 53, 56, 70, 106, 140, 212, 265, 280, 371, 424, 530, 742, 1060, 1439, 1484, 1855, 2120, 2878, 2968, 3710, 5756, 7195, 7420, 10073, 11512, 14390, 14840, 20146, 28780, 40292, 50365, 57560, 76267, 80584, 100730, 152534, 201460, 305068, 381335, 402920, 533869, 610136, 762670, 1067738, 1525340, 2135476, 2669345, 3050680, 4270952, 5338690, 10677380, 21354760]

約数ペア:

[(1, 21354760), (2, 10677380), (4, 5338690), (5, 4270952), (7, 3050680), (8, 2669345), (10, 2135476), (14, 1525340), (20, 1067738), (28, 762670), (35, 610136), (40, 533869), (53, 402920), (56, 381335), (70, 305068), (106, 201460), (140, 152534), (212, 100730), (265, 80584), (280, 76267), (371, 57560), (424, 50365), (530, 40292), (742, 28780), (1060, 20146), (1439, 14840), (1484, 14390), (1855, 11512), (2120, 10073), (2878, 7420), (2968, 7195), (3710, 5756)]