21187908

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{1013}}^1$

素因数の和:1113

約数の個数: 72

約数和(自身を含む): 62008128

約数和(自身を除く): 40820220

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 83, 84, 126, 166, 249, 252, 332, 498, 581, 747, 996, 1013, 1162, 1494, 1743, 2026, 2324, 2988, 3039, 3486, 4052, 5229, 6078, 6972, 7091, 9117, 10458, 12156, 14182, 18234, 20916, 21273, 28364, 36468, 42546, 63819, 84079, 85092, 127638, 168158, 252237, 255276, 336316, 504474, 588553, 756711, 1008948, 1177106, 1513422, 1765659, 2354212, 3026844, 3531318, 5296977, 7062636, 10593954, 21187908]

約数ペア:

[(1, 21187908), (2, 10593954), (3, 7062636), (4, 5296977), (6, 3531318), (7, 3026844), (9, 2354212), (12, 1765659), (14, 1513422), (18, 1177106), (21, 1008948), (28, 756711), (36, 588553), (42, 504474), (63, 336316), (83, 255276), (84, 252237), (126, 168158), (166, 127638), (249, 85092), (252, 84079), (332, 63819), (498, 42546), (581, 36468), (747, 28364), (996, 21273), (1013, 20916), (1162, 18234), (1494, 14182), (1743, 12156), (2026, 10458), (2324, 9117), (2988, 7091), (3039, 6972), (3486, 6078), (4052, 5229)]