21418740

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{191}}^1$

素因数の和:302

約数の個数: 144

約数和(自身を含む): 75479040

約数和(自身を除く): 54060300

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, 84, 89, 90, 105, 126, 140, 178, 180, 191, 210, 252, 267, 315, 356, 382, 420, 445, 534, 573, 623, 630, 764, 801, 890, 955, 1068, 1146, 1246, 1260, 1335, 1337, 1602, 1719, 1780, 1869, 1910, 2292, 2492, 2670, 2674, 2865, 3115, 3204, 3438, 3738, 3820, 4005, 4011, 5340, 5348, 5607, 5730, 6230, 6685, 6876, 7476, 8010, 8022, 8595, 9345, 11214, 11460, 12033, 12460, 13370, 16020, 16044, 16999, 17190, 18690, 20055, 22428, 24066, 26740, 28035, 33998, 34380, 37380, 40110, 48132, 50997, 56070, 60165, 67996, 80220, 84995, 101994, 112140, 118993, 120330, 152991, 169990, 203988, 237986, 240660, 254985, 305982, 339980, 356979, 475972, 509970, 594965, 611964, 713958, 764955, 1019940, 1070937, 1189930, 1427916, 1529910, 1784895, 2141874, 2379860, 3059820, 3569790, 4283748, 5354685, 7139580, 10709370, 21418740]

約数ペア:

[(1, 21418740), (2, 10709370), (3, 7139580), (4, 5354685), (5, 4283748), (6, 3569790), (7, 3059820), (9, 2379860), (10, 2141874), (12, 1784895), (14, 1529910), (15, 1427916), (18, 1189930), (20, 1070937), (21, 1019940), (28, 764955), (30, 713958), (35, 611964), (36, 594965), (42, 509970), (45, 475972), (60, 356979), (63, 339980), (70, 305982), (84, 254985), (89, 240660), (90, 237986), (105, 203988), (126, 169990), (140, 152991), (178, 120330), (180, 118993), (191, 112140), (210, 101994), (252, 84995), (267, 80220), (315, 67996), (356, 60165), (382, 56070), (420, 50997), (445, 48132), (534, 40110), (573, 37380), (623, 34380), (630, 33998), (764, 28035), (801, 26740), (890, 24066), (955, 22428), (1068, 20055), (1146, 18690), (1246, 17190), (1260, 16999), (1335, 16044), (1337, 16020), (1602, 13370), (1719, 12460), (1780, 12033), (1869, 11460), (1910, 11214), (2292, 9345), (2492, 8595), (2670, 8022), (2674, 8010), (2865, 7476), (3115, 6876), (3204, 6685), (3438, 6230), (3738, 5730), (3820, 5607), (4005, 5348), (4011, 5340)]