20451720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1301}}^1$

素因数の和:1446

約数の個数: 64

約数和(自身を含む): 61871040

約数和(自身を除く): 41419320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 131, 262, 393, 524, 655, 786, 1048, 1301, 1310, 1572, 1965, 2602, 2620, 3144, 3903, 3930, 5204, 5240, 6505, 7806, 7860, 10408, 13010, 15612, 15720, 19515, 26020, 31224, 39030, 52040, 78060, 156120, 170431, 340862, 511293, 681724, 852155, 1022586, 1363448, 1704310, 2045172, 2556465, 3408620, 4090344, 5112930, 6817240, 10225860, 20451720]

約数ペア:

[(1, 20451720), (2, 10225860), (3, 6817240), (4, 5112930), (5, 4090344), (6, 3408620), (8, 2556465), (10, 2045172), (12, 1704310), (15, 1363448), (20, 1022586), (24, 852155), (30, 681724), (40, 511293), (60, 340862), (120, 170431), (131, 156120), (262, 78060), (393, 52040), (524, 39030), (655, 31224), (786, 26020), (1048, 19515), (1301, 15720), (1310, 15612), (1572, 13010), (1965, 10408), (2602, 7860), (2620, 7806), (3144, 6505), (3903, 5240), (3930, 5204)]