20721480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{359}}^1$

素因数の和:423

約数の個数: 128

約数和(自身を含む): 68947200

約数和(自身を除く): 48225720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 37, 39, 40, 52, 60, 65, 74, 78, 104, 111, 120, 130, 148, 156, 185, 195, 222, 260, 296, 312, 359, 370, 390, 444, 481, 520, 555, 718, 740, 780, 888, 962, 1077, 1110, 1436, 1443, 1480, 1560, 1795, 1924, 2154, 2220, 2405, 2872, 2886, 3590, 3848, 4308, 4440, 4667, 4810, 5385, 5772, 7180, 7215, 8616, 9334, 9620, 10770, 11544, 13283, 14001, 14360, 14430, 18668, 19240, 21540, 23335, 26566, 28002, 28860, 37336, 39849, 43080, 46670, 53132, 56004, 57720, 66415, 70005, 79698, 93340, 106264, 112008, 132830, 140010, 159396, 172679, 186680, 199245, 265660, 280020, 318792, 345358, 398490, 518037, 531320, 560040, 690716, 796980, 863395, 1036074, 1381432, 1593960, 1726790, 2072148, 2590185, 3453580, 4144296, 5180370, 6907160, 10360740, 20721480]

約数ペア:

[(1, 20721480), (2, 10360740), (3, 6907160), (4, 5180370), (5, 4144296), (6, 3453580), (8, 2590185), (10, 2072148), (12, 1726790), (13, 1593960), (15, 1381432), (20, 1036074), (24, 863395), (26, 796980), (30, 690716), (37, 560040), (39, 531320), (40, 518037), (52, 398490), (60, 345358), (65, 318792), (74, 280020), (78, 265660), (104, 199245), (111, 186680), (120, 172679), (130, 159396), (148, 140010), (156, 132830), (185, 112008), (195, 106264), (222, 93340), (260, 79698), (296, 70005), (312, 66415), (359, 57720), (370, 56004), (390, 53132), (444, 46670), (481, 43080), (520, 39849), (555, 37336), (718, 28860), (740, 28002), (780, 26566), (888, 23335), (962, 21540), (1077, 19240), (1110, 18668), (1436, 14430), (1443, 14360), (1480, 14001), (1560, 13283), (1795, 11544), (1924, 10770), (2154, 9620), (2220, 9334), (2405, 8616), (2872, 7215), (2886, 7180), (3590, 5772), (3848, 5385), (4308, 4810), (4440, 4667)]