21272580

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16883}}^1$

素因数の和:16905

約数の個数: 72

約数和(自身を含む): 73749312

約数和(自身を除く): 52476732

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16883, 33766, 50649, 67532, 84415, 101298, 118181, 151947, 168830, 202596, 236362, 253245, 303894, 337660, 354543, 472724, 506490, 590905, 607788, 709086, 759735, 1012980, 1063629, 1181810, 1418172, 1519470, 1772715, 2127258, 2363620, 3038940, 3545430, 4254516, 5318145, 7090860, 10636290, 21272580]

約数ペア:

[(1, 21272580), (2, 10636290), (3, 7090860), (4, 5318145), (5, 4254516), (6, 3545430), (7, 3038940), (9, 2363620), (10, 2127258), (12, 1772715), (14, 1519470), (15, 1418172), (18, 1181810), (20, 1063629), (21, 1012980), (28, 759735), (30, 709086), (35, 607788), (36, 590905), (42, 506490), (45, 472724), (60, 354543), (63, 337660), (70, 303894), (84, 253245), (90, 236362), (105, 202596), (126, 168830), (140, 151947), (180, 118181), (210, 101298), (252, 84415), (315, 67532), (420, 50649), (630, 33766), (1260, 16883)]