20768156920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{509}}^1\times {\mathrm{145721}}^1$

素因数の和:146248

約数の個数: 64

約数和(自身を含む): 53509118400

約数和(自身を除く): 32740961480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 509, 1018, 2036, 2545, 3563, 4072, 5090, 7126, 10180, 14252, 17815, 20360, 28504, 35630, 71260, 142520, 145721, 291442, 582884, 728605, 1020047, 1165768, 1457210, 2040094, 2914420, 4080188, 5100235, 5828840, 8160376, 10200470, 20400940, 40801880, 74171989, 148343978, 296687956, 370859945, 519203923, 593375912, 741719890, 1038407846, 1483439780, 2076815692, 2596019615, 2966879560, 4153631384, 5192039230, 10384078460, 20768156920]

約数ペア:

[(1, 20768156920), (2, 10384078460), (4, 5192039230), (5, 4153631384), (7, 2966879560), (8, 2596019615), (10, 2076815692), (14, 1483439780), (20, 1038407846), (28, 741719890), (35, 593375912), (40, 519203923), (56, 370859945), (70, 296687956), (140, 148343978), (280, 74171989), (509, 40801880), (1018, 20400940), (2036, 10200470), (2545, 8160376), (3563, 5828840), (4072, 5100235), (5090, 4080188), (7126, 2914420), (10180, 2040094), (14252, 1457210), (17815, 1165768), (20360, 1020047), (28504, 728605), (35630, 582884), (71260, 291442), (142520, 145721)]