81047820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{192971}}^1$

素因数の和:192990

約数の個数: 48

約数和(自身を含む): 259354368

約数和(自身を除く): 178306548

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 192971, 385942, 578913, 771884, 964855, 1157826, 1350797, 1929710, 2315652, 2701594, 2894565, 3859420, 4052391, 5403188, 5789130, 6753985, 8104782, 11578260, 13507970, 16209564, 20261955, 27015940, 40523910, 81047820]

約数ペア:

[(1, 81047820), (2, 40523910), (3, 27015940), (4, 20261955), (5, 16209564), (6, 13507970), (7, 11578260), (10, 8104782), (12, 6753985), (14, 5789130), (15, 5403188), (20, 4052391), (21, 3859420), (28, 2894565), (30, 2701594), (35, 2315652), (42, 1929710), (60, 1350797), (70, 1157826), (84, 964855), (105, 771884), (140, 578913), (210, 385942), (420, 192971)]