21490788

素因数分解:

$2^2\times 3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:253

約数の個数: 96

約数和(自身を含む): 59246208

約数和(自身を除く): 37755420

約数列:

[1, 2, 3, 4, 6, 11, 12, 17, 22, 33, 34, 44, 51, 61, 66, 68, 102, 122, 132, 157, 183, 187, 204, 244, 314, 366, 374, 471, 561, 628, 671, 732, 748, 942, 1037, 1122, 1342, 1727, 1884, 2013, 2074, 2244, 2669, 2684, 3111, 3454, 4026, 4148, 5181, 5338, 6222, 6908, 8007, 8052, 9577, 10362, 10676, 11407, 12444, 16014, 19154, 20724, 22814, 28731, 29359, 32028, 34221, 38308, 45628, 57462, 58718, 68442, 88077, 105347, 114924, 117436, 136884, 162809, 176154, 210694, 316041, 325618, 352308, 421388, 488427, 632082, 651236, 976854, 1264164, 1790899, 1953708, 3581798, 5372697, 7163596, 10745394, 21490788]

約数ペア:

[(1, 21490788), (2, 10745394), (3, 7163596), (4, 5372697), (6, 3581798), (11, 1953708), (12, 1790899), (17, 1264164), (22, 976854), (33, 651236), (34, 632082), (44, 488427), (51, 421388), (61, 352308), (66, 325618), (68, 316041), (102, 210694), (122, 176154), (132, 162809), (157, 136884), (183, 117436), (187, 114924), (204, 105347), (244, 88077), (314, 68442), (366, 58718), (374, 57462), (471, 45628), (561, 38308), (628, 34221), (671, 32028), (732, 29359), (748, 28731), (942, 22814), (1037, 20724), (1122, 19154), (1342, 16014), (1727, 12444), (1884, 11407), (2013, 10676), (2074, 10362), (2244, 9577), (2669, 8052), (2684, 8007), (3111, 6908), (3454, 6222), (4026, 5338), (4148, 5181)]