20749820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{877}}^1$

素因数の和:919

約数の個数: 72

約数和(自身を含む): 53986464

約数和(自身を除く): 33236644

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 169, 182, 260, 338, 364, 455, 676, 845, 877, 910, 1183, 1690, 1754, 1820, 2366, 3380, 3508, 4385, 4732, 5915, 6139, 8770, 11401, 11830, 12278, 17540, 22802, 23660, 24556, 30695, 45604, 57005, 61390, 79807, 114010, 122780, 148213, 159614, 228020, 296426, 319228, 399035, 592852, 741065, 798070, 1037491, 1482130, 1596140, 2074982, 2964260, 4149964, 5187455, 10374910, 20749820]

約数ペア:

[(1, 20749820), (2, 10374910), (4, 5187455), (5, 4149964), (7, 2964260), (10, 2074982), (13, 1596140), (14, 1482130), (20, 1037491), (26, 798070), (28, 741065), (35, 592852), (52, 399035), (65, 319228), (70, 296426), (91, 228020), (130, 159614), (140, 148213), (169, 122780), (182, 114010), (260, 79807), (338, 61390), (364, 57005), (455, 45604), (676, 30695), (845, 24556), (877, 23660), (910, 22802), (1183, 17540), (1690, 12278), (1754, 11830), (1820, 11401), (2366, 8770), (3380, 6139), (3508, 5915), (4385, 4732)]