20958520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1$

素因数の和:173

約数の個数: 128

約数和(自身を含む): 57024000

約数和(自身を除く): 36065480

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 23, 38, 40, 44, 46, 55, 76, 88, 92, 95, 109, 110, 115, 152, 184, 190, 209, 218, 220, 230, 253, 380, 418, 436, 437, 440, 460, 506, 545, 760, 836, 872, 874, 920, 1012, 1045, 1090, 1199, 1265, 1672, 1748, 2024, 2071, 2090, 2180, 2185, 2398, 2507, 2530, 3496, 4142, 4180, 4360, 4370, 4796, 4807, 5014, 5060, 5995, 8284, 8360, 8740, 9592, 9614, 10028, 10120, 10355, 11990, 12535, 16568, 17480, 19228, 20056, 20710, 22781, 23980, 24035, 25070, 27577, 38456, 41420, 45562, 47633, 47960, 48070, 50140, 55154, 82840, 91124, 95266, 96140, 100280, 110308, 113905, 137885, 182248, 190532, 192280, 220616, 227810, 238165, 275770, 381064, 455620, 476330, 523963, 551540, 911240, 952660, 1047926, 1103080, 1905320, 2095852, 2619815, 4191704, 5239630, 10479260, 20958520]

約数ペア:

[(1, 20958520), (2, 10479260), (4, 5239630), (5, 4191704), (8, 2619815), (10, 2095852), (11, 1905320), (19, 1103080), (20, 1047926), (22, 952660), (23, 911240), (38, 551540), (40, 523963), (44, 476330), (46, 455620), (55, 381064), (76, 275770), (88, 238165), (92, 227810), (95, 220616), (109, 192280), (110, 190532), (115, 182248), (152, 137885), (184, 113905), (190, 110308), (209, 100280), (218, 96140), (220, 95266), (230, 91124), (253, 82840), (380, 55154), (418, 50140), (436, 48070), (437, 47960), (440, 47633), (460, 45562), (506, 41420), (545, 38456), (760, 27577), (836, 25070), (872, 24035), (874, 23980), (920, 22781), (1012, 20710), (1045, 20056), (1090, 19228), (1199, 17480), (1265, 16568), (1672, 12535), (1748, 11990), (2024, 10355), (2071, 10120), (2090, 10028), (2180, 9614), (2185, 9592), (2398, 8740), (2507, 8360), (2530, 8284), (3496, 5995), (4142, 5060), (4180, 5014), (4360, 4807), (4370, 4796)]