21210210

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:408

約数の個数: 96

約数和(自身を含む): 63752832

約数和(自身を除く): 42542622

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 63, 70, 90, 105, 126, 131, 210, 257, 262, 315, 393, 514, 630, 655, 771, 786, 917, 1179, 1285, 1310, 1542, 1799, 1834, 1965, 2313, 2358, 2570, 2751, 3598, 3855, 3930, 4585, 4626, 5397, 5502, 5895, 7710, 8253, 8995, 9170, 10794, 11565, 11790, 13755, 16191, 16506, 17990, 23130, 26985, 27510, 32382, 33667, 41265, 53970, 67334, 80955, 82530, 101001, 161910, 168335, 202002, 235669, 303003, 336670, 471338, 505005, 606006, 707007, 1010010, 1178345, 1414014, 1515015, 2121021, 2356690, 3030030, 3535035, 4242042, 7070070, 10605105, 21210210]

約数ペア:

[(1, 21210210), (2, 10605105), (3, 7070070), (5, 4242042), (6, 3535035), (7, 3030030), (9, 2356690), (10, 2121021), (14, 1515015), (15, 1414014), (18, 1178345), (21, 1010010), (30, 707007), (35, 606006), (42, 505005), (45, 471338), (63, 336670), (70, 303003), (90, 235669), (105, 202002), (126, 168335), (131, 161910), (210, 101001), (257, 82530), (262, 80955), (315, 67334), (393, 53970), (514, 41265), (630, 33667), (655, 32382), (771, 27510), (786, 26985), (917, 23130), (1179, 17990), (1285, 16506), (1310, 16191), (1542, 13755), (1799, 11790), (1834, 11565), (1965, 10794), (2313, 9170), (2358, 8995), (2570, 8253), (2751, 7710), (3598, 5895), (3855, 5502), (3930, 5397), (4585, 4626)]