19402780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{383}}^1$

素因数の和:558

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 24142820

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 149, 170, 298, 340, 383, 596, 745, 766, 1490, 1532, 1915, 2533, 2980, 3830, 5066, 6511, 7660, 10132, 12665, 13022, 25330, 26044, 32555, 50660, 57067, 65110, 114134, 130220, 228268, 285335, 570670, 970139, 1141340, 1940278, 3880556, 4850695, 9701390, 19402780]

約数ペア:

[(1, 19402780), (2, 9701390), (4, 4850695), (5, 3880556), (10, 1940278), (17, 1141340), (20, 970139), (34, 570670), (68, 285335), (85, 228268), (149, 130220), (170, 114134), (298, 65110), (340, 57067), (383, 50660), (596, 32555), (745, 26044), (766, 25330), (1490, 13022), (1532, 12665), (1915, 10132), (2533, 7660), (2980, 6511), (3830, 5066)]