21129255

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:310

約数の個数: 80

約数和(自身を含む): 44953920

約数和(自身を除く): 23824665

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 29, 35, 45, 63, 81, 87, 105, 135, 145, 189, 203, 257, 261, 315, 405, 435, 567, 609, 771, 783, 945, 1015, 1285, 1305, 1799, 1827, 2313, 2349, 2835, 3045, 3855, 3915, 5397, 5481, 6939, 7453, 8995, 9135, 11565, 11745, 16191, 16443, 20817, 22359, 26985, 27405, 34695, 37265, 48573, 52171, 67077, 80955, 82215, 104085, 111795, 145719, 156513, 201231, 242865, 260855, 335385, 469539, 603693, 728595, 782565, 1006155, 1408617, 2347695, 3018465, 4225851, 7043085, 21129255]

約数ペア:

[(1, 21129255), (3, 7043085), (5, 4225851), (7, 3018465), (9, 2347695), (15, 1408617), (21, 1006155), (27, 782565), (29, 728595), (35, 603693), (45, 469539), (63, 335385), (81, 260855), (87, 242865), (105, 201231), (135, 156513), (145, 145719), (189, 111795), (203, 104085), (257, 82215), (261, 80955), (315, 67077), (405, 52171), (435, 48573), (567, 37265), (609, 34695), (771, 27405), (783, 26985), (945, 22359), (1015, 20817), (1285, 16443), (1305, 16191), (1799, 11745), (1827, 11565), (2313, 9135), (2349, 8995), (2835, 7453), (3045, 6939), (3855, 5481), (3915, 5397)]