21381840

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:562

約数の個数: 160

約数和(自身を含む): 77673600

約数和(自身を除く): 56291760

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 27, 30, 36, 38, 40, 45, 48, 54, 57, 60, 72, 76, 80, 90, 95, 108, 114, 120, 135, 144, 152, 171, 180, 190, 216, 228, 240, 270, 285, 304, 342, 360, 380, 432, 456, 513, 521, 540, 570, 684, 720, 760, 855, 912, 1026, 1042, 1080, 1140, 1368, 1520, 1563, 1710, 2052, 2084, 2160, 2280, 2565, 2605, 2736, 3126, 3420, 4104, 4168, 4560, 4689, 5130, 5210, 6252, 6840, 7815, 8208, 8336, 9378, 9899, 10260, 10420, 12504, 13680, 14067, 15630, 18756, 19798, 20520, 20840, 23445, 25008, 28134, 29697, 31260, 37512, 39596, 41040, 41680, 46890, 49495, 56268, 59394, 62520, 70335, 75024, 79192, 89091, 93780, 98990, 112536, 118788, 125040, 140670, 148485, 158384, 178182, 187560, 197980, 225072, 237576, 267273, 281340, 296970, 356364, 375120, 395960, 445455, 475152, 534546, 562680, 593940, 712728, 791920, 890910, 1069092, 1125360, 1187880, 1336365, 1425456, 1781820, 2138184, 2375760, 2672730, 3563640, 4276368, 5345460, 7127280, 10690920, 21381840]

約数ペア:

[(1, 21381840), (2, 10690920), (3, 7127280), (4, 5345460), (5, 4276368), (6, 3563640), (8, 2672730), (9, 2375760), (10, 2138184), (12, 1781820), (15, 1425456), (16, 1336365), (18, 1187880), (19, 1125360), (20, 1069092), (24, 890910), (27, 791920), (30, 712728), (36, 593940), (38, 562680), (40, 534546), (45, 475152), (48, 445455), (54, 395960), (57, 375120), (60, 356364), (72, 296970), (76, 281340), (80, 267273), (90, 237576), (95, 225072), (108, 197980), (114, 187560), (120, 178182), (135, 158384), (144, 148485), (152, 140670), (171, 125040), (180, 118788), (190, 112536), (216, 98990), (228, 93780), (240, 89091), (270, 79192), (285, 75024), (304, 70335), (342, 62520), (360, 59394), (380, 56268), (432, 49495), (456, 46890), (513, 41680), (521, 41040), (540, 39596), (570, 37512), (684, 31260), (720, 29697), (760, 28134), (855, 25008), (912, 23445), (1026, 20840), (1042, 20520), (1080, 19798), (1140, 18756), (1368, 15630), (1520, 14067), (1563, 13680), (1710, 12504), (2052, 10420), (2084, 10260), (2160, 9899), (2280, 9378), (2565, 8336), (2605, 8208), (2736, 7815), (3126, 6840), (3420, 6252), (4104, 5210), (4168, 5130), (4560, 4689)]