21321720

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{8461}}^1$

素因数の和:8485

約数の個数: 96

約数和(自身を含む): 79204320

約数和(自身を除く): 57882600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 56, 60, 63, 70, 72, 84, 90, 105, 120, 126, 140, 168, 180, 210, 252, 280, 315, 360, 420, 504, 630, 840, 1260, 2520, 8461, 16922, 25383, 33844, 42305, 50766, 59227, 67688, 76149, 84610, 101532, 118454, 126915, 152298, 169220, 177681, 203064, 236908, 253830, 296135, 304596, 338440, 355362, 380745, 473816, 507660, 533043, 592270, 609192, 710724, 761490, 888405, 1015320, 1066086, 1184540, 1421448, 1522980, 1776810, 2132172, 2369080, 2665215, 3045960, 3553620, 4264344, 5330430, 7107240, 10660860, 21321720]

約数ペア:

[(1, 21321720), (2, 10660860), (3, 7107240), (4, 5330430), (5, 4264344), (6, 3553620), (7, 3045960), (8, 2665215), (9, 2369080), (10, 2132172), (12, 1776810), (14, 1522980), (15, 1421448), (18, 1184540), (20, 1066086), (21, 1015320), (24, 888405), (28, 761490), (30, 710724), (35, 609192), (36, 592270), (40, 533043), (42, 507660), (45, 473816), (56, 380745), (60, 355362), (63, 338440), (70, 304596), (72, 296135), (84, 253830), (90, 236908), (105, 203064), (120, 177681), (126, 169220), (140, 152298), (168, 126915), (180, 118454), (210, 101532), (252, 84610), (280, 76149), (315, 67688), (360, 59227), (420, 50766), (504, 42305), (630, 33844), (840, 25383), (1260, 16922), (2520, 8461)]