19937580

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25561}}^1$

素因数の和:25586

約数の個数: 48

約数和(自身を含む): 60121824

約数和(自身を除く): 40184244

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 25561, 51122, 76683, 102244, 127805, 153366, 255610, 306732, 332293, 383415, 511220, 664586, 766830, 996879, 1329172, 1533660, 1661465, 1993758, 3322930, 3987516, 4984395, 6645860, 9968790, 19937580]

約数ペア:

[(1, 19937580), (2, 9968790), (3, 6645860), (4, 4984395), (5, 3987516), (6, 3322930), (10, 1993758), (12, 1661465), (13, 1533660), (15, 1329172), (20, 996879), (26, 766830), (30, 664586), (39, 511220), (52, 383415), (60, 332293), (65, 306732), (78, 255610), (130, 153366), (156, 127805), (195, 102244), (260, 76683), (390, 51122), (780, 25561)]