21353578.000000000

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{661}}^1$

素因数の和:708

約数の個数: 144

約数和(自身を含む): 451675980

約数和(自身を除く): 294913220

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 88, 98, 110, 121, 140, 154, 196, 220, 242, 245, 280, 308, 385, 392, 440, 484, 490, 539, 605, 616, 661, 770, 847, 968, 980, 1078, 1210, 1322, 1540, 1694, 1960, 2156, 2420, 2644, 2695, 3080, 3305, 3388, 4235, 4312, 4627, 4840, 5288, 5390, 5929, 6610, 6776, 7271, 8470, 9254, 10780, 11858, 13220, 14542, 16940, 18508, 21560, 23135, 23716, 26440, 29084, 29645, 32389, 33880, 36355, 37016, 46270, 47432, 50897, 58168, 59290, 64778, 72710, 79981, 92540, 101794, 118580, 129556, 145420, 159962, 161945, 185080, 203588, 237160, 254485, 259112, 290840, 319924, 323890, 356279, 399905, 407176, 508970, 559867, 639848, 647780, 712558, 799810, 1017940, 1119734, 1295560, 1425116, 1599620, 1781395, 2035880, 2239468, 2799335, 2850232, 3199240, 3562790, 3919069, 4478936, 5598670, 7125580, 7838138, 11197340, 14251160, 15676276, 19595345, 22394680, 31352552, 39190690, 78381380, 156762760]

約数ペア:

[(1, 156762760), (2, 78381380), (4, 39190690), (5, 31352552), (7, 22394680), (8, 19595345), (10, 15676276), (11, 14251160), (14, 11197340), (20, 7838138), (22, 7125580), (28, 5598670), (35, 4478936), (40, 3919069), (44, 3562790), (49, 3199240), (55, 2850232), (56, 2799335), (70, 2239468), (77, 2035880), (88, 1781395), (98, 1599620), (110, 1425116), (121, 1295560), (140, 1119734), (154, 1017940), (196, 799810), (220, 712558), (242, 647780), (245, 639848), (280, 559867), (308, 508970), (385, 407176), (392, 399905), (440, 356279), (484, 323890), (490, 319924), (539, 290840), (605, 259112), (616, 254485), (661, 237160), (770, 203588), (847, 185080), (968, 161945), (980, 159962), (1078, 145420), (1210, 129556), (1322, 118580), (1540, 101794), (1694, 92540), (1960, 79981), (2156, 72710), (2420, 64778), (2644, 59290), (2695, 58168), (3080, 50897), (3305, 47432), (3388, 46270), (4235, 37016), (4312, 36355), (4627, 33880), (4840, 32389), (5288, 29645), (5390, 29084), (5929, 26440), (6610, 23716), (6776, 23135), (7271, 21560), (8470, 18508), (9254, 16940), (10780, 14542), (11858, 13220)]