20530720

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{797}}^1$

素因数の和:842

約数の個数: 96

約数和(自身を含む): 57915648

約数和(自身を除く): 37384928

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 160, 161, 184, 224, 230, 280, 322, 368, 460, 560, 644, 736, 797, 805, 920, 1120, 1288, 1594, 1610, 1840, 2576, 3188, 3220, 3680, 3985, 5152, 5579, 6376, 6440, 7970, 11158, 12752, 12880, 15940, 18331, 22316, 25504, 25760, 27895, 31880, 36662, 44632, 55790, 63760, 73324, 89264, 91655, 111580, 127520, 128317, 146648, 178528, 183310, 223160, 256634, 293296, 366620, 446320, 513268, 586592, 641585, 733240, 892640, 1026536, 1283170, 1466480, 2053072, 2566340, 2932960, 4106144, 5132680, 10265360, 20530720]

約数ペア:

[(1, 20530720), (2, 10265360), (4, 5132680), (5, 4106144), (7, 2932960), (8, 2566340), (10, 2053072), (14, 1466480), (16, 1283170), (20, 1026536), (23, 892640), (28, 733240), (32, 641585), (35, 586592), (40, 513268), (46, 446320), (56, 366620), (70, 293296), (80, 256634), (92, 223160), (112, 183310), (115, 178528), (140, 146648), (160, 128317), (161, 127520), (184, 111580), (224, 91655), (230, 89264), (280, 73324), (322, 63760), (368, 55790), (460, 44632), (560, 36662), (644, 31880), (736, 27895), (797, 25760), (805, 25504), (920, 22316), (1120, 18331), (1288, 15940), (1594, 12880), (1610, 12752), (1840, 11158), (2576, 7970), (3188, 6440), (3220, 6376), (3680, 5579), (3985, 5152)]