21821880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{563}}^1$

素因数の和:613

約数の個数: 128

約数和(自身を含む): 73094400

約数和(自身を除く): 51272520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 19, 20, 24, 30, 34, 38, 40, 51, 57, 60, 68, 76, 85, 95, 102, 114, 120, 136, 152, 170, 190, 204, 228, 255, 285, 323, 340, 380, 408, 456, 510, 563, 570, 646, 680, 760, 969, 1020, 1126, 1140, 1292, 1615, 1689, 1938, 2040, 2252, 2280, 2584, 2815, 3230, 3378, 3876, 4504, 4845, 5630, 6460, 6756, 7752, 8445, 9571, 9690, 10697, 11260, 12920, 13512, 16890, 19142, 19380, 21394, 22520, 28713, 32091, 33780, 38284, 38760, 42788, 47855, 53485, 57426, 64182, 67560, 76568, 85576, 95710, 106970, 114852, 128364, 143565, 160455, 181849, 191420, 213940, 229704, 256728, 287130, 320910, 363698, 382840, 427880, 545547, 574260, 641820, 727396, 909245, 1091094, 1148520, 1283640, 1454792, 1818490, 2182188, 2727735, 3636980, 4364376, 5455470, 7273960, 10910940, 21821880]

約数ペア:

[(1, 21821880), (2, 10910940), (3, 7273960), (4, 5455470), (5, 4364376), (6, 3636980), (8, 2727735), (10, 2182188), (12, 1818490), (15, 1454792), (17, 1283640), (19, 1148520), (20, 1091094), (24, 909245), (30, 727396), (34, 641820), (38, 574260), (40, 545547), (51, 427880), (57, 382840), (60, 363698), (68, 320910), (76, 287130), (85, 256728), (95, 229704), (102, 213940), (114, 191420), (120, 181849), (136, 160455), (152, 143565), (170, 128364), (190, 114852), (204, 106970), (228, 95710), (255, 85576), (285, 76568), (323, 67560), (340, 64182), (380, 57426), (408, 53485), (456, 47855), (510, 42788), (563, 38760), (570, 38284), (646, 33780), (680, 32091), (760, 28713), (969, 22520), (1020, 21394), (1126, 19380), (1140, 19142), (1292, 16890), (1615, 13512), (1689, 12920), (1938, 11260), (2040, 10697), (2252, 9690), (2280, 9571), (2584, 8445), (2815, 7752), (3230, 6756), (3378, 6460), (3876, 5630), (4504, 4845)]