19500860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{443}}^1$

素因数の和:554

約数の個数: 48

約数和(自身を含む): 42964992

約数和(自身を除く): 23464132

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 71, 124, 142, 155, 284, 310, 355, 443, 620, 710, 886, 1420, 1772, 2201, 2215, 4402, 4430, 8804, 8860, 11005, 13733, 22010, 27466, 31453, 44020, 54932, 62906, 68665, 125812, 137330, 157265, 274660, 314530, 629060, 975043, 1950086, 3900172, 4875215, 9750430, 19500860]

約数ペア:

[(1, 19500860), (2, 9750430), (4, 4875215), (5, 3900172), (10, 1950086), (20, 975043), (31, 629060), (62, 314530), (71, 274660), (124, 157265), (142, 137330), (155, 125812), (284, 68665), (310, 62906), (355, 54932), (443, 44020), (620, 31453), (710, 27466), (886, 22010), (1420, 13733), (1772, 11005), (2201, 8860), (2215, 8804), (4402, 4430)]