18520725

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{317}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 33122880

約数和(自身を除く): 14602155

約数列:

[1, 3, 5, 15, 19, 25, 41, 57, 75, 95, 123, 205, 285, 317, 475, 615, 779, 951, 1025, 1425, 1585, 2337, 3075, 3895, 4755, 6023, 7925, 11685, 12997, 18069, 19475, 23775, 30115, 38991, 58425, 64985, 90345, 150575, 194955, 246943, 324925, 451725, 740829, 974775, 1234715, 3704145, 6173575, 18520725]

約数ペア:

[(1, 18520725), (3, 6173575), (5, 3704145), (15, 1234715), (19, 974775), (25, 740829), (41, 451725), (57, 324925), (75, 246943), (95, 194955), (123, 150575), (205, 90345), (285, 64985), (317, 58425), (475, 38991), (615, 30115), (779, 23775), (951, 19475), (1025, 18069), (1425, 12997), (1585, 11685), (2337, 7925), (3075, 6023), (3895, 4755)]