21357140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:110

約数の個数: 144

約数和(自身を含む): 58222080

約数和(自身を除く): 36864940

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 31, 35, 37, 38, 49, 62, 70, 74, 76, 95, 98, 124, 133, 140, 148, 155, 185, 190, 196, 217, 245, 259, 266, 310, 370, 380, 434, 490, 518, 532, 589, 620, 665, 703, 740, 868, 931, 980, 1036, 1085, 1147, 1178, 1295, 1330, 1406, 1519, 1813, 1862, 2170, 2294, 2356, 2590, 2660, 2812, 2945, 3038, 3515, 3626, 3724, 4123, 4340, 4588, 4655, 4921, 5180, 5735, 5890, 6076, 7030, 7252, 7595, 8029, 8246, 9065, 9310, 9842, 11470, 11780, 14060, 15190, 16058, 16492, 18130, 18620, 19684, 20615, 21793, 22940, 24605, 28861, 30380, 32116, 34447, 36260, 40145, 41230, 43586, 49210, 56203, 57722, 68894, 80290, 82460, 87172, 98420, 108965, 112406, 115444, 137788, 144305, 152551, 160580, 172235, 217930, 224812, 281015, 288610, 305102, 344470, 435860, 562030, 577220, 610204, 688940, 762755, 1067857, 1124060, 1525510, 2135714, 3051020, 4271428, 5339285, 10678570, 21357140]

約数ペア:

[(1, 21357140), (2, 10678570), (4, 5339285), (5, 4271428), (7, 3051020), (10, 2135714), (14, 1525510), (19, 1124060), (20, 1067857), (28, 762755), (31, 688940), (35, 610204), (37, 577220), (38, 562030), (49, 435860), (62, 344470), (70, 305102), (74, 288610), (76, 281015), (95, 224812), (98, 217930), (124, 172235), (133, 160580), (140, 152551), (148, 144305), (155, 137788), (185, 115444), (190, 112406), (196, 108965), (217, 98420), (245, 87172), (259, 82460), (266, 80290), (310, 68894), (370, 57722), (380, 56203), (434, 49210), (490, 43586), (518, 41230), (532, 40145), (589, 36260), (620, 34447), (665, 32116), (703, 30380), (740, 28861), (868, 24605), (931, 22940), (980, 21793), (1036, 20615), (1085, 19684), (1147, 18620), (1178, 18130), (1295, 16492), (1330, 16058), (1406, 15190), (1519, 14060), (1813, 11780), (1862, 11470), (2170, 9842), (2294, 9310), (2356, 9065), (2590, 8246), (2660, 8029), (2812, 7595), (2945, 7252), (3038, 7030), (3515, 6076), (3626, 5890), (3724, 5735), (4123, 5180), (4340, 4921), (4588, 4655)]