19810540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1409}}^1$

素因数の和:1474

約数の個数: 48

約数和(自身を含む): 45007200

約数和(自身を除く): 25196660

約数列:

[1, 2, 4, 5, 10, 19, 20, 37, 38, 74, 76, 95, 148, 185, 190, 370, 380, 703, 740, 1406, 1409, 2812, 2818, 3515, 5636, 7030, 7045, 14060, 14090, 26771, 28180, 52133, 53542, 104266, 107084, 133855, 208532, 260665, 267710, 521330, 535420, 990527, 1042660, 1981054, 3962108, 4952635, 9905270, 19810540]

約数ペア:

[(1, 19810540), (2, 9905270), (4, 4952635), (5, 3962108), (10, 1981054), (19, 1042660), (20, 990527), (37, 535420), (38, 521330), (74, 267710), (76, 260665), (95, 208532), (148, 133855), (185, 107084), (190, 104266), (370, 53542), (380, 52133), (703, 28180), (740, 26771), (1406, 14090), (1409, 14060), (2812, 7045), (2818, 7030), (3515, 5636)]