20908360

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:143

約数の個数: 128

約数和(自身を含む): 56246400

約数和(自身を除く): 35338040

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 41, 44, 55, 61, 76, 82, 88, 95, 110, 122, 152, 164, 190, 205, 209, 220, 244, 305, 328, 380, 410, 418, 440, 451, 488, 610, 671, 760, 779, 820, 836, 902, 1045, 1159, 1220, 1342, 1558, 1640, 1672, 1804, 2090, 2255, 2318, 2440, 2501, 2684, 3116, 3355, 3608, 3895, 4180, 4510, 4636, 5002, 5368, 5795, 6232, 6710, 7790, 8360, 8569, 9020, 9272, 10004, 11590, 12505, 12749, 13420, 15580, 17138, 18040, 20008, 23180, 25010, 25498, 26840, 27511, 31160, 34276, 42845, 46360, 47519, 50020, 50996, 55022, 63745, 68552, 85690, 95038, 100040, 101992, 110044, 127490, 137555, 171380, 190076, 220088, 237595, 254980, 275110, 342760, 380152, 475190, 509960, 522709, 550220, 950380, 1045418, 1100440, 1900760, 2090836, 2613545, 4181672, 5227090, 10454180, 20908360]

約数ペア:

[(1, 20908360), (2, 10454180), (4, 5227090), (5, 4181672), (8, 2613545), (10, 2090836), (11, 1900760), (19, 1100440), (20, 1045418), (22, 950380), (38, 550220), (40, 522709), (41, 509960), (44, 475190), (55, 380152), (61, 342760), (76, 275110), (82, 254980), (88, 237595), (95, 220088), (110, 190076), (122, 171380), (152, 137555), (164, 127490), (190, 110044), (205, 101992), (209, 100040), (220, 95038), (244, 85690), (305, 68552), (328, 63745), (380, 55022), (410, 50996), (418, 50020), (440, 47519), (451, 46360), (488, 42845), (610, 34276), (671, 31160), (760, 27511), (779, 26840), (820, 25498), (836, 25010), (902, 23180), (1045, 20008), (1159, 18040), (1220, 17138), (1342, 15580), (1558, 13420), (1640, 12749), (1672, 12505), (1804, 11590), (2090, 10004), (2255, 9272), (2318, 9020), (2440, 8569), (2501, 8360), (2684, 7790), (3116, 6710), (3355, 6232), (3608, 5795), (3895, 5368), (4180, 5002), (4510, 4636)]