21337428

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{653}}^1$

素因数の和:1056

約数の個数: 48

約数和(自身を含む): 57133440

約数和(自身を除く): 35796012

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 389, 653, 778, 1167, 1306, 1556, 1959, 2334, 2612, 2723, 3918, 4571, 4668, 5446, 7836, 8169, 9142, 10892, 13713, 16338, 18284, 27426, 32676, 54852, 254017, 508034, 762051, 1016068, 1524102, 1778119, 3048204, 3556238, 5334357, 7112476, 10668714, 21337428]

約数ペア:

[(1, 21337428), (2, 10668714), (3, 7112476), (4, 5334357), (6, 3556238), (7, 3048204), (12, 1778119), (14, 1524102), (21, 1016068), (28, 762051), (42, 508034), (84, 254017), (389, 54852), (653, 32676), (778, 27426), (1167, 18284), (1306, 16338), (1556, 13713), (1959, 10892), (2334, 9142), (2612, 8169), (2723, 7836), (3918, 5446), (4571, 4668)]