21137970

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:256

約数の個数: 128

約数和(自身を含む): 63700992

約数和(自身を除く): 42563022

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 17, 21, 30, 31, 34, 35, 42, 51, 62, 70, 85, 93, 102, 105, 119, 155, 170, 186, 191, 210, 217, 238, 255, 310, 357, 382, 434, 465, 510, 527, 573, 595, 651, 714, 930, 955, 1054, 1085, 1146, 1190, 1302, 1337, 1581, 1785, 1910, 2170, 2635, 2674, 2865, 3162, 3247, 3255, 3570, 3689, 4011, 5270, 5730, 5921, 6494, 6510, 6685, 7378, 7905, 8022, 9741, 11067, 11842, 13370, 15810, 16235, 17763, 18445, 19482, 20055, 22134, 22729, 29605, 32470, 35526, 36890, 40110, 41447, 45458, 48705, 55335, 59210, 68187, 82894, 88815, 97410, 100657, 110670, 113645, 124341, 136374, 177630, 201314, 207235, 227290, 248682, 301971, 340935, 414470, 503285, 603942, 621705, 681870, 704599, 1006570, 1243410, 1409198, 1509855, 2113797, 3019710, 3522995, 4227594, 7045990, 10568985, 21137970]

約数ペア:

[(1, 21137970), (2, 10568985), (3, 7045990), (5, 4227594), (6, 3522995), (7, 3019710), (10, 2113797), (14, 1509855), (15, 1409198), (17, 1243410), (21, 1006570), (30, 704599), (31, 681870), (34, 621705), (35, 603942), (42, 503285), (51, 414470), (62, 340935), (70, 301971), (85, 248682), (93, 227290), (102, 207235), (105, 201314), (119, 177630), (155, 136374), (170, 124341), (186, 113645), (191, 110670), (210, 100657), (217, 97410), (238, 88815), (255, 82894), (310, 68187), (357, 59210), (382, 55335), (434, 48705), (465, 45458), (510, 41447), (527, 40110), (573, 36890), (595, 35526), (651, 32470), (714, 29605), (930, 22729), (955, 22134), (1054, 20055), (1085, 19482), (1146, 18445), (1190, 17763), (1302, 16235), (1337, 15810), (1581, 13370), (1785, 11842), (1910, 11067), (2170, 9741), (2635, 8022), (2674, 7905), (2865, 7378), (3162, 6685), (3247, 6510), (3255, 6494), (3570, 5921), (3689, 5730), (4011, 5270)]