21989660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:267

約数の個数: 96

約数和(自身を含む): 58544640

約数和(自身を除く): 36554980

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 109, 110, 131, 140, 154, 218, 220, 262, 308, 385, 436, 524, 545, 655, 763, 770, 917, 1090, 1199, 1310, 1441, 1526, 1540, 1834, 2180, 2398, 2620, 2882, 3052, 3668, 3815, 4585, 4796, 5764, 5995, 7205, 7630, 8393, 9170, 10087, 11990, 14279, 14410, 15260, 16786, 18340, 20174, 23980, 28558, 28820, 33572, 40348, 41965, 50435, 57116, 71395, 83930, 99953, 100870, 142790, 157069, 167860, 199906, 201740, 285580, 314138, 399812, 499765, 628276, 785345, 999530, 1099483, 1570690, 1999060, 2198966, 3141380, 4397932, 5497415, 10994830, 21989660]

約数ペア:

[(1, 21989660), (2, 10994830), (4, 5497415), (5, 4397932), (7, 3141380), (10, 2198966), (11, 1999060), (14, 1570690), (20, 1099483), (22, 999530), (28, 785345), (35, 628276), (44, 499765), (55, 399812), (70, 314138), (77, 285580), (109, 201740), (110, 199906), (131, 167860), (140, 157069), (154, 142790), (218, 100870), (220, 99953), (262, 83930), (308, 71395), (385, 57116), (436, 50435), (524, 41965), (545, 40348), (655, 33572), (763, 28820), (770, 28558), (917, 23980), (1090, 20174), (1199, 18340), (1310, 16786), (1441, 15260), (1526, 14410), (1540, 14279), (1834, 11990), (2180, 10087), (2398, 9170), (2620, 8393), (2882, 7630), (3052, 7205), (3668, 5995), (3815, 5764), (4585, 4796)]