21343420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{751}}^1$

素因数の和:803

約数の個数: 72

約数和(自身を含む): 54008640

約数和(自身を除く): 32665220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 751, 812, 980, 1015, 1421, 1502, 2030, 2842, 3004, 3755, 4060, 5257, 5684, 7105, 7510, 10514, 14210, 15020, 21028, 21779, 26285, 28420, 36799, 43558, 52570, 73598, 87116, 105140, 108895, 147196, 152453, 183995, 217790, 304906, 367990, 435580, 609812, 735980, 762265, 1067171, 1524530, 2134342, 3049060, 4268684, 5335855, 10671710, 21343420]

約数ペア:

[(1, 21343420), (2, 10671710), (4, 5335855), (5, 4268684), (7, 3049060), (10, 2134342), (14, 1524530), (20, 1067171), (28, 762265), (29, 735980), (35, 609812), (49, 435580), (58, 367990), (70, 304906), (98, 217790), (116, 183995), (140, 152453), (145, 147196), (196, 108895), (203, 105140), (245, 87116), (290, 73598), (406, 52570), (490, 43558), (580, 36799), (751, 28420), (812, 26285), (980, 21779), (1015, 21028), (1421, 15020), (1502, 14210), (2030, 10514), (2842, 7510), (3004, 7105), (3755, 5684), (4060, 5257)]