21615720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25733}}^1$

素因数の和:25754

約数の個数: 64

約数和(自身を含む): 74113920

約数和(自身を除く): 52498200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25733, 51466, 77199, 102932, 128665, 154398, 180131, 205864, 257330, 308796, 360262, 385995, 514660, 540393, 617592, 720524, 771990, 900655, 1029320, 1080786, 1441048, 1543980, 1801310, 2161572, 2701965, 3087960, 3602620, 4323144, 5403930, 7205240, 10807860, 21615720]

約数ペア:

[(1, 21615720), (2, 10807860), (3, 7205240), (4, 5403930), (5, 4323144), (6, 3602620), (7, 3087960), (8, 2701965), (10, 2161572), (12, 1801310), (14, 1543980), (15, 1441048), (20, 1080786), (21, 1029320), (24, 900655), (28, 771990), (30, 720524), (35, 617592), (40, 540393), (42, 514660), (56, 385995), (60, 360262), (70, 308796), (84, 257330), (105, 205864), (120, 180131), (140, 154398), (168, 128665), (210, 102932), (280, 77199), (420, 51466), (840, 25733)]