21498516

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{647}}^1$

素因数の和:741

約数の個数: 72

約数和(自身を含む): 59439744

約数和(自身を除く): 37941228

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 71, 78, 117, 142, 156, 213, 234, 284, 426, 468, 639, 647, 852, 923, 1278, 1294, 1846, 1941, 2556, 2588, 2769, 3692, 3882, 5538, 5823, 7764, 8307, 8411, 11076, 11646, 16614, 16822, 23292, 25233, 33228, 33644, 45937, 50466, 75699, 91874, 100932, 137811, 151398, 183748, 275622, 302796, 413433, 551244, 597181, 826866, 1194362, 1653732, 1791543, 2388724, 3583086, 5374629, 7166172, 10749258, 21498516]

約数ペア:

[(1, 21498516), (2, 10749258), (3, 7166172), (4, 5374629), (6, 3583086), (9, 2388724), (12, 1791543), (13, 1653732), (18, 1194362), (26, 826866), (36, 597181), (39, 551244), (52, 413433), (71, 302796), (78, 275622), (117, 183748), (142, 151398), (156, 137811), (213, 100932), (234, 91874), (284, 75699), (426, 50466), (468, 45937), (639, 33644), (647, 33228), (852, 25233), (923, 23292), (1278, 16822), (1294, 16614), (1846, 11646), (1941, 11076), (2556, 8411), (2588, 8307), (2769, 7764), (3692, 5823), (3882, 5538)]