20153359940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{289643}}^1$

素因数の和:289737

約数の個数: 72

約数和(自身を含む): 49925356992

約数和(自身を除く): 29771997052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 71, 98, 140, 142, 196, 245, 284, 355, 490, 497, 710, 980, 994, 1420, 1988, 2485, 3479, 4970, 6958, 9940, 13916, 17395, 34790, 69580, 289643, 579286, 1158572, 1448215, 2027501, 2896430, 4055002, 5792860, 8110004, 10137505, 14192507, 20275010, 20564653, 28385014, 40550020, 41129306, 56770028, 70962535, 82258612, 102823265, 141925070, 143952571, 205646530, 283850140, 287905142, 411293060, 575810284, 719762855, 1007667997, 1439525710, 2015335994, 2879051420, 4030671988, 5038339985, 10076679970, 20153359940]

約数ペア:

[(1, 20153359940), (2, 10076679970), (4, 5038339985), (5, 4030671988), (7, 2879051420), (10, 2015335994), (14, 1439525710), (20, 1007667997), (28, 719762855), (35, 575810284), (49, 411293060), (70, 287905142), (71, 283850140), (98, 205646530), (140, 143952571), (142, 141925070), (196, 102823265), (245, 82258612), (284, 70962535), (355, 56770028), (490, 41129306), (497, 40550020), (710, 28385014), (980, 20564653), (994, 20275010), (1420, 14192507), (1988, 10137505), (2485, 8110004), (3479, 5792860), (4970, 4055002), (6958, 2896430), (9940, 2027501), (13916, 1448215), (17395, 1158572), (34790, 579286), (69580, 289643)]