20724900

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:234

約数の個数: 144

約数和(自身を含む): 69995520

約数和(自身を除く): 49270620

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 71, 75, 84, 100, 105, 139, 140, 142, 150, 175, 210, 213, 278, 284, 300, 350, 355, 417, 420, 426, 497, 525, 556, 695, 700, 710, 834, 852, 973, 994, 1050, 1065, 1390, 1420, 1491, 1668, 1775, 1946, 1988, 2085, 2100, 2130, 2485, 2780, 2919, 2982, 3475, 3550, 3892, 4170, 4260, 4865, 4970, 5325, 5838, 5964, 6950, 7100, 7455, 8340, 9730, 9869, 9940, 10425, 10650, 11676, 12425, 13900, 14595, 14910, 19460, 19738, 20850, 21300, 24325, 24850, 29190, 29607, 29820, 37275, 39476, 41700, 48650, 49345, 49700, 58380, 59214, 69083, 72975, 74550, 97300, 98690, 118428, 138166, 145950, 148035, 149100, 197380, 207249, 246725, 276332, 291900, 296070, 345415, 414498, 493450, 592140, 690830, 740175, 828996, 986900, 1036245, 1381660, 1480350, 1727075, 2072490, 2960700, 3454150, 4144980, 5181225, 6908300, 10362450, 20724900]

約数ペア:

[(1, 20724900), (2, 10362450), (3, 6908300), (4, 5181225), (5, 4144980), (6, 3454150), (7, 2960700), (10, 2072490), (12, 1727075), (14, 1480350), (15, 1381660), (20, 1036245), (21, 986900), (25, 828996), (28, 740175), (30, 690830), (35, 592140), (42, 493450), (50, 414498), (60, 345415), (70, 296070), (71, 291900), (75, 276332), (84, 246725), (100, 207249), (105, 197380), (139, 149100), (140, 148035), (142, 145950), (150, 138166), (175, 118428), (210, 98690), (213, 97300), (278, 74550), (284, 72975), (300, 69083), (350, 59214), (355, 58380), (417, 49700), (420, 49345), (426, 48650), (497, 41700), (525, 39476), (556, 37275), (695, 29820), (700, 29607), (710, 29190), (834, 24850), (852, 24325), (973, 21300), (994, 20850), (1050, 19738), (1065, 19460), (1390, 14910), (1420, 14595), (1491, 13900), (1668, 12425), (1775, 11676), (1946, 10650), (1988, 10425), (2085, 9940), (2100, 9869), (2130, 9730), (2485, 8340), (2780, 7455), (2919, 7100), (2982, 6950), (3475, 5964), (3550, 5838), (3892, 5325), (4170, 4970), (4260, 4865)]