20495895

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:224

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 19317225

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 53, 87, 105, 127, 145, 159, 203, 265, 371, 381, 435, 609, 635, 795, 889, 1015, 1113, 1537, 1855, 1905, 2667, 3045, 3683, 4445, 4611, 5565, 6731, 7685, 10759, 11049, 13335, 18415, 20193, 23055, 25781, 32277, 33655, 47117, 53795, 55245, 77343, 100965, 128905, 141351, 161385, 195199, 235585, 386715, 585597, 706755, 975995, 1366393, 2927985, 4099179, 6831965, 20495895]

約数ペア:

[(1, 20495895), (3, 6831965), (5, 4099179), (7, 2927985), (15, 1366393), (21, 975995), (29, 706755), (35, 585597), (53, 386715), (87, 235585), (105, 195199), (127, 161385), (145, 141351), (159, 128905), (203, 100965), (265, 77343), (371, 55245), (381, 53795), (435, 47117), (609, 33655), (635, 32277), (795, 25781), (889, 23055), (1015, 20193), (1113, 18415), (1537, 13335), (1855, 11049), (1905, 10759), (2667, 7685), (3045, 6731), (3683, 5565), (4445, 4611)]