21159420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{4967}}^1$

素因数の和:5050

約数の個数: 48

約数和(自身を含む): 60092928

約数和(自身を除く): 38933508

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 71, 142, 213, 284, 355, 426, 710, 852, 1065, 1420, 2130, 4260, 4967, 9934, 14901, 19868, 24835, 29802, 49670, 59604, 74505, 99340, 149010, 298020, 352657, 705314, 1057971, 1410628, 1763285, 2115942, 3526570, 4231884, 5289855, 7053140, 10579710, 21159420]

約数ペア:

[(1, 21159420), (2, 10579710), (3, 7053140), (4, 5289855), (5, 4231884), (6, 3526570), (10, 2115942), (12, 1763285), (15, 1410628), (20, 1057971), (30, 705314), (60, 352657), (71, 298020), (142, 149010), (213, 99340), (284, 74505), (355, 59604), (426, 49670), (710, 29802), (852, 24835), (1065, 19868), (1420, 14901), (2130, 9934), (4260, 4967)]