21999645

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{181}}^1$

素因数の和:302

約数の個数: 48

約数和(自身を含む): 39919152

約数和(自身を除く): 17919507

約数列:

[1, 3, 5, 9, 15, 37, 45, 73, 111, 181, 185, 219, 333, 365, 543, 555, 657, 905, 1095, 1629, 1665, 2701, 2715, 3285, 6697, 8103, 8145, 13213, 13505, 20091, 24309, 33485, 39639, 40515, 60273, 66065, 100455, 118917, 121545, 198195, 301365, 488881, 594585, 1466643, 2444405, 4399929, 7333215, 21999645]

約数ペア:

[(1, 21999645), (3, 7333215), (5, 4399929), (9, 2444405), (15, 1466643), (37, 594585), (45, 488881), (73, 301365), (111, 198195), (181, 121545), (185, 118917), (219, 100455), (333, 66065), (365, 60273), (543, 40515), (555, 39639), (657, 33485), (905, 24309), (1095, 20091), (1629, 13505), (1665, 13213), (2701, 8145), (2715, 8103), (3285, 6697)]