21515220

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1$

素因数の和:276

約数の個数: 144

約数和(自身を含む): 71547840

約数和(自身を除く): 50032620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 36, 38, 45, 54, 57, 60, 76, 81, 90, 95, 108, 114, 135, 162, 171, 180, 190, 228, 233, 243, 270, 285, 324, 342, 380, 405, 466, 486, 513, 540, 570, 684, 699, 810, 855, 932, 972, 1026, 1140, 1165, 1215, 1398, 1539, 1620, 1710, 2052, 2097, 2330, 2430, 2565, 2796, 3078, 3420, 3495, 4194, 4427, 4617, 4660, 4860, 5130, 6156, 6291, 6990, 7695, 8388, 8854, 9234, 10260, 10485, 12582, 13281, 13980, 15390, 17708, 18468, 18873, 20970, 22135, 23085, 25164, 26562, 30780, 31455, 37746, 39843, 41940, 44270, 46170, 53124, 56619, 62910, 66405, 75492, 79686, 88540, 92340, 94365, 113238, 119529, 125820, 132810, 159372, 188730, 199215, 226476, 239058, 265620, 283095, 358587, 377460, 398430, 478116, 566190, 597645, 717174, 796860, 1075761, 1132380, 1195290, 1434348, 1792935, 2151522, 2390580, 3585870, 4303044, 5378805, 7171740, 10757610, 21515220]

約数ペア:

[(1, 21515220), (2, 10757610), (3, 7171740), (4, 5378805), (5, 4303044), (6, 3585870), (9, 2390580), (10, 2151522), (12, 1792935), (15, 1434348), (18, 1195290), (19, 1132380), (20, 1075761), (27, 796860), (30, 717174), (36, 597645), (38, 566190), (45, 478116), (54, 398430), (57, 377460), (60, 358587), (76, 283095), (81, 265620), (90, 239058), (95, 226476), (108, 199215), (114, 188730), (135, 159372), (162, 132810), (171, 125820), (180, 119529), (190, 113238), (228, 94365), (233, 92340), (243, 88540), (270, 79686), (285, 75492), (324, 66405), (342, 62910), (380, 56619), (405, 53124), (466, 46170), (486, 44270), (513, 41940), (540, 39843), (570, 37746), (684, 31455), (699, 30780), (810, 26562), (855, 25164), (932, 23085), (972, 22135), (1026, 20970), (1140, 18873), (1165, 18468), (1215, 17708), (1398, 15390), (1539, 13980), (1620, 13281), (1710, 12582), (2052, 10485), (2097, 10260), (2330, 9234), (2430, 8854), (2565, 8388), (2796, 7695), (3078, 6990), (3420, 6291), (3495, 6156), (4194, 5130), (4427, 4860), (4617, 4660)]