18840780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{787}}^1$

素因数の和:828

約数の個数: 144

約数和(自身を含む): 68839680

約数和(自身を除く): 49998900

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 19, 20, 21, 28, 30, 35, 36, 38, 42, 45, 57, 60, 63, 70, 76, 84, 90, 95, 105, 114, 126, 133, 140, 171, 180, 190, 210, 228, 252, 266, 285, 315, 342, 380, 399, 420, 532, 570, 630, 665, 684, 787, 798, 855, 1140, 1197, 1260, 1330, 1574, 1596, 1710, 1995, 2361, 2394, 2660, 3148, 3420, 3935, 3990, 4722, 4788, 5509, 5985, 7083, 7870, 7980, 9444, 11018, 11805, 11970, 14166, 14953, 15740, 16527, 22036, 23610, 23940, 27545, 28332, 29906, 33054, 35415, 44859, 47220, 49581, 55090, 59812, 66108, 70830, 74765, 82635, 89718, 99162, 104671, 110180, 134577, 141660, 149530, 165270, 179436, 198324, 209342, 224295, 247905, 269154, 299060, 314013, 330540, 418684, 448590, 495810, 523355, 538308, 628026, 672885, 897180, 942039, 991620, 1046710, 1256052, 1345770, 1570065, 1884078, 2093420, 2691540, 3140130, 3768156, 4710195, 6280260, 9420390, 18840780]

約数ペア:

[(1, 18840780), (2, 9420390), (3, 6280260), (4, 4710195), (5, 3768156), (6, 3140130), (7, 2691540), (9, 2093420), (10, 1884078), (12, 1570065), (14, 1345770), (15, 1256052), (18, 1046710), (19, 991620), (20, 942039), (21, 897180), (28, 672885), (30, 628026), (35, 538308), (36, 523355), (38, 495810), (42, 448590), (45, 418684), (57, 330540), (60, 314013), (63, 299060), (70, 269154), (76, 247905), (84, 224295), (90, 209342), (95, 198324), (105, 179436), (114, 165270), (126, 149530), (133, 141660), (140, 134577), (171, 110180), (180, 104671), (190, 99162), (210, 89718), (228, 82635), (252, 74765), (266, 70830), (285, 66108), (315, 59812), (342, 55090), (380, 49581), (399, 47220), (420, 44859), (532, 35415), (570, 33054), (630, 29906), (665, 28332), (684, 27545), (787, 23940), (798, 23610), (855, 22036), (1140, 16527), (1197, 15740), (1260, 14953), (1330, 14166), (1574, 11970), (1596, 11805), (1710, 11018), (1995, 9444), (2361, 7980), (2394, 7870), (2660, 7083), (3148, 5985), (3420, 5509), (3935, 4788), (3990, 4722)]