19985706

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{383}}^1$

素因数の和:627

約数の個数: 48

約数和(自身を含む): 46964736

約数和(自身を除く): 26979030

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 223, 234, 383, 446, 669, 766, 1149, 1338, 2007, 2298, 2899, 3447, 4014, 4979, 5798, 6894, 8697, 9958, 14937, 17394, 26091, 29874, 44811, 52182, 85409, 89622, 170818, 256227, 512454, 768681, 1110317, 1537362, 2220634, 3330951, 6661902, 9992853, 19985706]

約数ペア:

[(1, 19985706), (2, 9992853), (3, 6661902), (6, 3330951), (9, 2220634), (13, 1537362), (18, 1110317), (26, 768681), (39, 512454), (78, 256227), (117, 170818), (223, 89622), (234, 85409), (383, 52182), (446, 44811), (669, 29874), (766, 26091), (1149, 17394), (1338, 14937), (2007, 9958), (2298, 8697), (2899, 6894), (3447, 5798), (4014, 4979)]