20784105

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{317}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 38098944

約数和(自身を除く): 17314839

約数列:

[1, 3, 5, 9, 15, 31, 45, 47, 93, 141, 155, 235, 279, 317, 423, 465, 705, 951, 1395, 1457, 1585, 2115, 2853, 4371, 4755, 7285, 9827, 13113, 14265, 14899, 21855, 29481, 44697, 49135, 65565, 74495, 88443, 134091, 147405, 223485, 442215, 461869, 670455, 1385607, 2309345, 4156821, 6928035, 20784105]

約数ペア:

[(1, 20784105), (3, 6928035), (5, 4156821), (9, 2309345), (15, 1385607), (31, 670455), (45, 461869), (47, 442215), (93, 223485), (141, 147405), (155, 134091), (235, 88443), (279, 74495), (317, 65565), (423, 49135), (465, 44697), (705, 29481), (951, 21855), (1395, 14899), (1457, 14265), (1585, 13113), (2115, 9827), (2853, 7285), (4371, 4755)]