21262920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1489}}^1$

素因数の和:1527

約数の個数: 128

約数和(自身を含む): 77241600

約数和(自身を除く): 55978680

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 204, 210, 238, 255, 280, 340, 357, 408, 420, 476, 510, 595, 680, 714, 840, 952, 1020, 1190, 1428, 1489, 1785, 2040, 2380, 2856, 2978, 3570, 4467, 4760, 5956, 7140, 7445, 8934, 10423, 11912, 14280, 14890, 17868, 20846, 22335, 25313, 29780, 31269, 35736, 41692, 44670, 50626, 52115, 59560, 62538, 75939, 83384, 89340, 101252, 104230, 125076, 126565, 151878, 156345, 177191, 178680, 202504, 208460, 250152, 253130, 303756, 312690, 354382, 379695, 416920, 506260, 531573, 607512, 625380, 708764, 759390, 885955, 1012520, 1063146, 1250760, 1417528, 1518780, 1771910, 2126292, 2657865, 3037560, 3543820, 4252584, 5315730, 7087640, 10631460, 21262920]

約数ペア:

[(1, 21262920), (2, 10631460), (3, 7087640), (4, 5315730), (5, 4252584), (6, 3543820), (7, 3037560), (8, 2657865), (10, 2126292), (12, 1771910), (14, 1518780), (15, 1417528), (17, 1250760), (20, 1063146), (21, 1012520), (24, 885955), (28, 759390), (30, 708764), (34, 625380), (35, 607512), (40, 531573), (42, 506260), (51, 416920), (56, 379695), (60, 354382), (68, 312690), (70, 303756), (84, 253130), (85, 250152), (102, 208460), (105, 202504), (119, 178680), (120, 177191), (136, 156345), (140, 151878), (168, 126565), (170, 125076), (204, 104230), (210, 101252), (238, 89340), (255, 83384), (280, 75939), (340, 62538), (357, 59560), (408, 52115), (420, 50626), (476, 44670), (510, 41692), (595, 35736), (680, 31269), (714, 29780), (840, 25313), (952, 22335), (1020, 20846), (1190, 17868), (1428, 14890), (1489, 14280), (1785, 11912), (2040, 10423), (2380, 8934), (2856, 7445), (2978, 7140), (3570, 5956), (4467, 4760)]