19915280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:145

約数の個数: 160

約数和(自身を含む): 59781888

約数和(自身を除く): 39866608

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 53, 55, 56, 61, 70, 77, 80, 88, 106, 110, 112, 122, 140, 154, 176, 212, 220, 244, 265, 280, 305, 308, 371, 385, 424, 427, 440, 488, 530, 560, 583, 610, 616, 671, 742, 770, 848, 854, 880, 976, 1060, 1166, 1220, 1232, 1342, 1484, 1540, 1708, 1855, 2120, 2135, 2332, 2440, 2684, 2915, 2968, 3080, 3233, 3355, 3416, 3710, 4081, 4240, 4270, 4664, 4697, 4880, 5368, 5830, 5936, 6160, 6466, 6710, 6832, 7420, 8162, 8540, 9328, 9394, 10736, 11660, 12932, 13420, 14840, 16165, 16324, 17080, 18788, 20405, 22631, 23320, 23485, 25864, 26840, 29680, 32330, 32648, 34160, 35563, 37576, 40810, 45262, 46640, 46970, 51728, 53680, 64660, 65296, 71126, 75152, 81620, 90524, 93940, 113155, 129320, 142252, 163240, 177815, 181048, 187880, 226310, 248941, 258640, 284504, 326480, 355630, 362096, 375760, 452620, 497882, 569008, 711260, 905240, 995764, 1244705, 1422520, 1810480, 1991528, 2489410, 2845040, 3983056, 4978820, 9957640, 19915280]

約数ペア:

[(1, 19915280), (2, 9957640), (4, 4978820), (5, 3983056), (7, 2845040), (8, 2489410), (10, 1991528), (11, 1810480), (14, 1422520), (16, 1244705), (20, 995764), (22, 905240), (28, 711260), (35, 569008), (40, 497882), (44, 452620), (53, 375760), (55, 362096), (56, 355630), (61, 326480), (70, 284504), (77, 258640), (80, 248941), (88, 226310), (106, 187880), (110, 181048), (112, 177815), (122, 163240), (140, 142252), (154, 129320), (176, 113155), (212, 93940), (220, 90524), (244, 81620), (265, 75152), (280, 71126), (305, 65296), (308, 64660), (371, 53680), (385, 51728), (424, 46970), (427, 46640), (440, 45262), (488, 40810), (530, 37576), (560, 35563), (583, 34160), (610, 32648), (616, 32330), (671, 29680), (742, 26840), (770, 25864), (848, 23485), (854, 23320), (880, 22631), (976, 20405), (1060, 18788), (1166, 17080), (1220, 16324), (1232, 16165), (1342, 14840), (1484, 13420), (1540, 12932), (1708, 11660), (1855, 10736), (2120, 9394), (2135, 9328), (2332, 8540), (2440, 8162), (2684, 7420), (2915, 6832), (2968, 6710), (3080, 6466), (3233, 6160), (3355, 5936), (3416, 5830), (3710, 5368), (4081, 4880), (4240, 4697), (4270, 4664)]