21330315

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{557}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 39693888

約数和(自身を除く): 18363573

約数列:

[1, 3, 5, 9, 15, 23, 37, 45, 69, 111, 115, 185, 207, 333, 345, 555, 557, 851, 1035, 1665, 1671, 2553, 2785, 4255, 5013, 7659, 8355, 12765, 12811, 20609, 25065, 38295, 38433, 61827, 64055, 103045, 115299, 185481, 192165, 309135, 474007, 576495, 927405, 1422021, 2370035, 4266063, 7110105, 21330315]

約数ペア:

[(1, 21330315), (3, 7110105), (5, 4266063), (9, 2370035), (15, 1422021), (23, 927405), (37, 576495), (45, 474007), (69, 309135), (111, 192165), (115, 185481), (185, 115299), (207, 103045), (333, 64055), (345, 61827), (555, 38433), (557, 38295), (851, 25065), (1035, 20609), (1665, 12811), (1671, 12765), (2553, 8355), (2785, 7659), (4255, 5013)]