21559860

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:334

約数の個数: 144

約数和(自身を含む): 76108032

約数和(自身を除く): 54548172

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 71, 84, 90, 105, 126, 140, 142, 180, 210, 213, 241, 252, 284, 315, 355, 420, 426, 482, 497, 630, 639, 710, 723, 852, 964, 994, 1065, 1205, 1260, 1278, 1420, 1446, 1491, 1687, 1988, 2130, 2169, 2410, 2485, 2556, 2892, 2982, 3195, 3374, 3615, 4260, 4338, 4473, 4820, 4970, 5061, 5964, 6390, 6748, 7230, 7455, 8435, 8676, 8946, 9940, 10122, 10845, 12780, 14460, 14910, 15183, 16870, 17111, 17892, 20244, 21690, 22365, 25305, 29820, 30366, 33740, 34222, 43380, 44730, 50610, 51333, 60732, 68444, 75915, 85555, 89460, 101220, 102666, 119777, 151830, 153999, 171110, 205332, 239554, 256665, 303660, 307998, 342220, 359331, 479108, 513330, 598885, 615996, 718662, 769995, 1026660, 1077993, 1197770, 1437324, 1539990, 1796655, 2155986, 2395540, 3079980, 3593310, 4311972, 5389965, 7186620, 10779930, 21559860]

約数ペア:

[(1, 21559860), (2, 10779930), (3, 7186620), (4, 5389965), (5, 4311972), (6, 3593310), (7, 3079980), (9, 2395540), (10, 2155986), (12, 1796655), (14, 1539990), (15, 1437324), (18, 1197770), (20, 1077993), (21, 1026660), (28, 769995), (30, 718662), (35, 615996), (36, 598885), (42, 513330), (45, 479108), (60, 359331), (63, 342220), (70, 307998), (71, 303660), (84, 256665), (90, 239554), (105, 205332), (126, 171110), (140, 153999), (142, 151830), (180, 119777), (210, 102666), (213, 101220), (241, 89460), (252, 85555), (284, 75915), (315, 68444), (355, 60732), (420, 51333), (426, 50610), (482, 44730), (497, 43380), (630, 34222), (639, 33740), (710, 30366), (723, 29820), (852, 25305), (964, 22365), (994, 21690), (1065, 20244), (1205, 17892), (1260, 17111), (1278, 16870), (1420, 15183), (1446, 14910), (1491, 14460), (1687, 12780), (1988, 10845), (2130, 10122), (2169, 9940), (2410, 8946), (2485, 8676), (2556, 8435), (2892, 7455), (2982, 7230), (3195, 6748), (3374, 6390), (3615, 5964), (4260, 5061), (4338, 4970), (4473, 4820)]