20211520

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{1289}}^1$

素因数の和:1320

約数の個数: 84

約数和(自身を含む): 56029860

約数和(自身を除く): 35818340

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 784, 980, 1120, 1289, 1568, 1960, 2240, 2578, 3136, 3920, 5156, 6445, 7840, 9023, 10312, 12890, 15680, 18046, 20624, 25780, 36092, 41248, 45115, 51560, 63161, 72184, 82496, 90230, 103120, 126322, 144368, 180460, 206240, 252644, 288736, 315805, 360920, 412480, 505288, 577472, 631610, 721840, 1010576, 1263220, 1443680, 2021152, 2526440, 2887360, 4042304, 5052880, 10105760, 20211520]

約数ペア:

[(1, 20211520), (2, 10105760), (4, 5052880), (5, 4042304), (7, 2887360), (8, 2526440), (10, 2021152), (14, 1443680), (16, 1263220), (20, 1010576), (28, 721840), (32, 631610), (35, 577472), (40, 505288), (49, 412480), (56, 360920), (64, 315805), (70, 288736), (80, 252644), (98, 206240), (112, 180460), (140, 144368), (160, 126322), (196, 103120), (224, 90230), (245, 82496), (280, 72184), (320, 63161), (392, 51560), (448, 45115), (490, 41248), (560, 36092), (784, 25780), (980, 20624), (1120, 18046), (1289, 15680), (1568, 12890), (1960, 10312), (2240, 9023), (2578, 7840), (3136, 6445), (3920, 5156)]