21309080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{953}}^1$

素因数の和:1020

約数の個数: 64

約数和(自身を含む): 52889760

約数和(自身を除く): 31580680

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 953, 1118, 1720, 1906, 2236, 2795, 3812, 4472, 4765, 5590, 7624, 9530, 11180, 12389, 19060, 22360, 24778, 38120, 40979, 49556, 61945, 81958, 99112, 123890, 163916, 204895, 247780, 327832, 409790, 495560, 532727, 819580, 1065454, 1639160, 2130908, 2663635, 4261816, 5327270, 10654540, 21309080]

約数ペア:

[(1, 21309080), (2, 10654540), (4, 5327270), (5, 4261816), (8, 2663635), (10, 2130908), (13, 1639160), (20, 1065454), (26, 819580), (40, 532727), (43, 495560), (52, 409790), (65, 327832), (86, 247780), (104, 204895), (130, 163916), (172, 123890), (215, 99112), (260, 81958), (344, 61945), (430, 49556), (520, 40979), (559, 38120), (860, 24778), (953, 22360), (1118, 19060), (1720, 12389), (1906, 11180), (2236, 9530), (2795, 7624), (3812, 5590), (4472, 4765)]