21205140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{89}}^1$

素因数の和:150

約数の個数: 144

約数和(自身を含む): 69128640

約数和(自身を除く): 47923500

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 19, 20, 22, 30, 33, 38, 44, 55, 57, 60, 66, 76, 89, 95, 110, 114, 132, 165, 178, 190, 209, 220, 228, 267, 285, 330, 356, 361, 380, 418, 445, 534, 570, 627, 660, 722, 836, 890, 979, 1045, 1068, 1083, 1140, 1254, 1335, 1444, 1691, 1780, 1805, 1958, 2090, 2166, 2508, 2670, 2937, 3135, 3382, 3610, 3916, 3971, 4180, 4332, 4895, 5073, 5340, 5415, 5874, 6270, 6764, 7220, 7942, 8455, 9790, 10146, 10830, 11748, 11913, 12540, 14685, 15884, 16910, 18601, 19580, 19855, 20292, 21660, 23826, 25365, 29370, 32129, 33820, 37202, 39710, 47652, 50730, 55803, 58740, 59565, 64258, 74404, 79420, 93005, 96387, 101460, 111606, 119130, 128516, 160645, 186010, 192774, 223212, 238260, 279015, 321290, 353419, 372020, 385548, 481935, 558030, 642580, 706838, 963870, 1060257, 1116060, 1413676, 1767095, 1927740, 2120514, 3534190, 4241028, 5301285, 7068380, 10602570, 21205140]

約数ペア:

[(1, 21205140), (2, 10602570), (3, 7068380), (4, 5301285), (5, 4241028), (6, 3534190), (10, 2120514), (11, 1927740), (12, 1767095), (15, 1413676), (19, 1116060), (20, 1060257), (22, 963870), (30, 706838), (33, 642580), (38, 558030), (44, 481935), (55, 385548), (57, 372020), (60, 353419), (66, 321290), (76, 279015), (89, 238260), (95, 223212), (110, 192774), (114, 186010), (132, 160645), (165, 128516), (178, 119130), (190, 111606), (209, 101460), (220, 96387), (228, 93005), (267, 79420), (285, 74404), (330, 64258), (356, 59565), (361, 58740), (380, 55803), (418, 50730), (445, 47652), (534, 39710), (570, 37202), (627, 33820), (660, 32129), (722, 29370), (836, 25365), (890, 23826), (979, 21660), (1045, 20292), (1068, 19855), (1083, 19580), (1140, 18601), (1254, 16910), (1335, 15884), (1444, 14685), (1691, 12540), (1780, 11913), (1805, 11748), (1958, 10830), (2090, 10146), (2166, 9790), (2508, 8455), (2670, 7942), (2937, 7220), (3135, 6764), (3382, 6270), (3610, 5874), (3916, 5415), (3971, 5340), (4180, 5073), (4332, 4895)]