21480060

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:475

約数の個数: 96

約数和(自身を含む): 69350400

約数和(自身を除く): 47870340

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 199, 210, 257, 398, 420, 514, 597, 771, 796, 995, 1028, 1194, 1285, 1393, 1542, 1799, 1990, 2388, 2570, 2786, 2985, 3084, 3598, 3855, 3980, 4179, 5140, 5397, 5572, 5970, 6965, 7196, 7710, 8358, 8995, 10794, 11940, 13930, 15420, 16716, 17990, 20895, 21588, 26985, 27860, 35980, 41790, 51143, 53970, 83580, 102286, 107940, 153429, 204572, 255715, 306858, 358001, 511430, 613716, 716002, 767145, 1022860, 1074003, 1432004, 1534290, 1790005, 2148006, 3068580, 3580010, 4296012, 5370015, 7160020, 10740030, 21480060]

約数ペア:

[(1, 21480060), (2, 10740030), (3, 7160020), (4, 5370015), (5, 4296012), (6, 3580010), (7, 3068580), (10, 2148006), (12, 1790005), (14, 1534290), (15, 1432004), (20, 1074003), (21, 1022860), (28, 767145), (30, 716002), (35, 613716), (42, 511430), (60, 358001), (70, 306858), (84, 255715), (105, 204572), (140, 153429), (199, 107940), (210, 102286), (257, 83580), (398, 53970), (420, 51143), (514, 41790), (597, 35980), (771, 27860), (796, 26985), (995, 21588), (1028, 20895), (1194, 17990), (1285, 16716), (1393, 15420), (1542, 13930), (1799, 11940), (1990, 10794), (2388, 8995), (2570, 8358), (2786, 7710), (2985, 7196), (3084, 6965), (3598, 5970), (3855, 5572), (3980, 5397), (4179, 5140)]