81399420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23801}}^1$

素因数の和:23835

約数の個数: 72

約数和(自身を含む): 259917840

約数和(自身を除く): 178518420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 342, 380, 570, 684, 855, 1140, 1710, 3420, 23801, 47602, 71403, 95204, 119005, 142806, 214209, 238010, 285612, 357015, 428418, 452219, 476020, 714030, 856836, 904438, 1071045, 1356657, 1428060, 1808876, 2142090, 2261095, 2713314, 4069971, 4284180, 4522190, 5426628, 6783285, 8139942, 9044380, 13566570, 16279884, 20349855, 27133140, 40699710, 81399420]

約数ペア:

[(1, 81399420), (2, 40699710), (3, 27133140), (4, 20349855), (5, 16279884), (6, 13566570), (9, 9044380), (10, 8139942), (12, 6783285), (15, 5426628), (18, 4522190), (19, 4284180), (20, 4069971), (30, 2713314), (36, 2261095), (38, 2142090), (45, 1808876), (57, 1428060), (60, 1356657), (76, 1071045), (90, 904438), (95, 856836), (114, 714030), (171, 476020), (180, 452219), (190, 428418), (228, 357015), (285, 285612), (342, 238010), (380, 214209), (570, 142806), (684, 119005), (855, 95204), (1140, 71403), (1710, 47602), (3420, 23801)]