21406554

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{227}}^1$

素因数の和:292

約数の個数: 72

約数和(自身を含む): 52071552

約数和(自身を除く): 30664998

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 31, 39, 62, 78, 93, 117, 169, 186, 227, 234, 279, 338, 403, 454, 507, 558, 681, 806, 1014, 1209, 1362, 1521, 2043, 2418, 2951, 3042, 3627, 4086, 5239, 5902, 7037, 7254, 8853, 10478, 14074, 15717, 17706, 21111, 26559, 31434, 38363, 42222, 47151, 53118, 63333, 76726, 91481, 94302, 115089, 126666, 182962, 230178, 274443, 345267, 548886, 690534, 823329, 1189253, 1646658, 2378506, 3567759, 7135518, 10703277, 21406554]

約数ペア:

[(1, 21406554), (2, 10703277), (3, 7135518), (6, 3567759), (9, 2378506), (13, 1646658), (18, 1189253), (26, 823329), (31, 690534), (39, 548886), (62, 345267), (78, 274443), (93, 230178), (117, 182962), (169, 126666), (186, 115089), (227, 94302), (234, 91481), (279, 76726), (338, 63333), (403, 53118), (454, 47151), (507, 42222), (558, 38363), (681, 31434), (806, 26559), (1014, 21111), (1209, 17706), (1362, 15717), (1521, 14074), (2043, 10478), (2418, 8853), (2951, 7254), (3042, 7037), (3627, 5902), (4086, 5239)]