21078840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{269}}^1\times {\mathrm{653}}^1$

素因数の和:936

約数の個数: 64

約数和(自身を含む): 63568800

約数和(自身を除く): 42489960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 269, 538, 653, 807, 1076, 1306, 1345, 1614, 1959, 2152, 2612, 2690, 3228, 3265, 3918, 4035, 5224, 5380, 6456, 6530, 7836, 8070, 9795, 10760, 13060, 15672, 16140, 19590, 26120, 32280, 39180, 78360, 175657, 351314, 526971, 702628, 878285, 1053942, 1405256, 1756570, 2107884, 2634855, 3513140, 4215768, 5269710, 7026280, 10539420, 21078840]

約数ペア:

[(1, 21078840), (2, 10539420), (3, 7026280), (4, 5269710), (5, 4215768), (6, 3513140), (8, 2634855), (10, 2107884), (12, 1756570), (15, 1405256), (20, 1053942), (24, 878285), (30, 702628), (40, 526971), (60, 351314), (120, 175657), (269, 78360), (538, 39180), (653, 32280), (807, 26120), (1076, 19590), (1306, 16140), (1345, 15672), (1614, 13060), (1959, 10760), (2152, 9795), (2612, 8070), (2690, 7836), (3228, 6530), (3265, 6456), (3918, 5380), (4035, 5224)]