64447760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2056

約数の個数: 80

約数和(自身を含む): 166656000

約数和(自身を除く): 102208240

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 1040, 1240, 1612, 1999, 2015, 2480, 3224, 3998, 4030, 6448, 7996, 8060, 9995, 15992, 16120, 19990, 25987, 31984, 32240, 39980, 51974, 61969, 79960, 103948, 123938, 129935, 159920, 207896, 247876, 259870, 309845, 415792, 495752, 519740, 619690, 805597, 991504, 1039480, 1239380, 1611194, 2078960, 2478760, 3222388, 4027985, 4957520, 6444776, 8055970, 12889552, 16111940, 32223880, 64447760]

約数ペア:

[(1, 64447760), (2, 32223880), (4, 16111940), (5, 12889552), (8, 8055970), (10, 6444776), (13, 4957520), (16, 4027985), (20, 3222388), (26, 2478760), (31, 2078960), (40, 1611194), (52, 1239380), (62, 1039480), (65, 991504), (80, 805597), (104, 619690), (124, 519740), (130, 495752), (155, 415792), (208, 309845), (248, 259870), (260, 247876), (310, 207896), (403, 159920), (496, 129935), (520, 123938), (620, 103948), (806, 79960), (1040, 61969), (1240, 51974), (1612, 39980), (1999, 32240), (2015, 31984), (2480, 25987), (3224, 19990), (3998, 16120), (4030, 15992), (6448, 9995), (7996, 8060)]