257015640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{305971}}^1$

素因数の和:305992

約数の個数: 64

約数和(自身を含む): 881199360

約数和(自身を除く): 624183720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 305971, 611942, 917913, 1223884, 1529855, 1835826, 2141797, 2447768, 3059710, 3671652, 4283594, 4589565, 6119420, 6425391, 7343304, 8567188, 9179130, 10708985, 12238840, 12850782, 17134376, 18358260, 21417970, 25701564, 32126955, 36716520, 42835940, 51403128, 64253910, 85671880, 128507820, 257015640]

約数ペア:

[(1, 257015640), (2, 128507820), (3, 85671880), (4, 64253910), (5, 51403128), (6, 42835940), (7, 36716520), (8, 32126955), (10, 25701564), (12, 21417970), (14, 18358260), (15, 17134376), (20, 12850782), (21, 12238840), (24, 10708985), (28, 9179130), (30, 8567188), (35, 7343304), (40, 6425391), (42, 6119420), (56, 4589565), (60, 4283594), (70, 3671652), (84, 3059710), (105, 2447768), (120, 2141797), (140, 1835826), (168, 1529855), (210, 1223884), (280, 917913), (420, 611942), (840, 305971)]