19881075

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{503}}^1$

素因数の和:564

約数の個数: 48

約数和(自身を含む): 35997696

約数和(自身を除く): 16116621

約数列:

[1, 3, 5, 15, 17, 25, 31, 51, 75, 85, 93, 155, 255, 425, 465, 503, 527, 775, 1275, 1509, 1581, 2325, 2515, 2635, 7545, 7905, 8551, 12575, 13175, 15593, 25653, 37725, 39525, 42755, 46779, 77965, 128265, 213775, 233895, 265081, 389825, 641325, 795243, 1169475, 1325405, 3976215, 6627025, 19881075]

約数ペア:

[(1, 19881075), (3, 6627025), (5, 3976215), (15, 1325405), (17, 1169475), (25, 795243), (31, 641325), (51, 389825), (75, 265081), (85, 233895), (93, 213775), (155, 128265), (255, 77965), (425, 46779), (465, 42755), (503, 39525), (527, 37725), (775, 25653), (1275, 15593), (1509, 13175), (1581, 12575), (2325, 8551), (2515, 7905), (2635, 7545)]