256595640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{305471}}^1$

素因数の和:305492

約数の個数: 64

約数和(自身を含む): 879759360

約数和(自身を除く): 623163720

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, 305471, 610942, 916413, 1221884, 1527355, 1832826, 2138297, 2443768, 3054710, 3665652, 4276594, 4582065, 6109420, 6414891, 7331304, 8553188, 9164130, 10691485, 12218840, 12829782, 17106376, 18328260, 21382970, 25659564, 32074455, 36656520, 42765940, 51319128, 64148910, 85531880, 128297820, 256595640]

約数ペア:

[(1, 256595640), (2, 128297820), (3, 85531880), (4, 64148910), (5, 51319128), (6, 42765940), (7, 36656520), (8, 32074455), (10, 25659564), (12, 21382970), (14, 18328260), (15, 17106376), (20, 12829782), (21, 12218840), (24, 10691485), (28, 9164130), (30, 8553188), (35, 7331304), (40, 6414891), (42, 6109420), (56, 4582065), (60, 4276594), (70, 3665652), (84, 3054710), (105, 2443768), (120, 2138297), (140, 1832826), (168, 1527355), (210, 1221884), (280, 916413), (420, 610942), (840, 305471)]