21493960

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{383}}^1$

素因数の和:478

約数の個数: 64

約数和(自身を含む): 51425280

約数和(自身を除く): 29931320

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 61, 92, 115, 122, 184, 230, 244, 305, 383, 460, 488, 610, 766, 920, 1220, 1403, 1532, 1915, 2440, 2806, 3064, 3830, 5612, 7015, 7660, 8809, 11224, 14030, 15320, 17618, 23363, 28060, 35236, 44045, 46726, 56120, 70472, 88090, 93452, 116815, 176180, 186904, 233630, 352360, 467260, 537349, 934520, 1074698, 2149396, 2686745, 4298792, 5373490, 10746980, 21493960]

約数ペア:

[(1, 21493960), (2, 10746980), (4, 5373490), (5, 4298792), (8, 2686745), (10, 2149396), (20, 1074698), (23, 934520), (40, 537349), (46, 467260), (61, 352360), (92, 233630), (115, 186904), (122, 176180), (184, 116815), (230, 93452), (244, 88090), (305, 70472), (383, 56120), (460, 46726), (488, 44045), (610, 35236), (766, 28060), (920, 23363), (1220, 17618), (1403, 15320), (1532, 14030), (1915, 11224), (2440, 8809), (2806, 7660), (3064, 7015), (3830, 5612)]