19876380

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1289}}^1$

素因数の和:1558

約数の個数: 48

約数和(自身を含む): 55913760

約数和(自身を除く): 36037380

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 257, 514, 771, 1028, 1285, 1289, 1542, 2570, 2578, 3084, 3855, 3867, 5140, 5156, 6445, 7710, 7734, 12890, 15420, 15468, 19335, 25780, 38670, 77340, 331273, 662546, 993819, 1325092, 1656365, 1987638, 3312730, 3975276, 4969095, 6625460, 9938190, 19876380]

約数ペア:

[(1, 19876380), (2, 9938190), (3, 6625460), (4, 4969095), (5, 3975276), (6, 3312730), (10, 1987638), (12, 1656365), (15, 1325092), (20, 993819), (30, 662546), (60, 331273), (257, 77340), (514, 38670), (771, 25780), (1028, 19335), (1285, 15468), (1289, 15420), (1542, 12890), (2570, 7734), (2578, 7710), (3084, 6445), (3855, 5156), (3867, 5140)]