21496917

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{229}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 32457600

約数和(自身を除く): 10960683

約数列:

[1, 3, 13, 29, 39, 83, 87, 229, 249, 377, 687, 1079, 1131, 2407, 2977, 3237, 6641, 7221, 8931, 19007, 19923, 31291, 57021, 86333, 93873, 247091, 258999, 551203, 741273, 1653609, 7165639, 21496917]

約数ペア:

[(1, 21496917), (3, 7165639), (13, 1653609), (29, 741273), (39, 551203), (83, 258999), (87, 247091), (229, 93873), (249, 86333), (377, 57021), (687, 31291), (1079, 19923), (1131, 19007), (2407, 8931), (2977, 7221), (3237, 6641)]