21389316

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{199}}^1$

素因数の和:285

約数の個数: 72

約数和(自身を含む): 55339200

約数和(自身を除く): 33949884

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 53, 78, 106, 156, 159, 169, 199, 212, 318, 338, 398, 507, 597, 636, 676, 689, 796, 1014, 1194, 1378, 2028, 2067, 2388, 2587, 2756, 4134, 5174, 7761, 8268, 8957, 10348, 10547, 15522, 17914, 21094, 26871, 31044, 31641, 33631, 35828, 42188, 53742, 63282, 67262, 100893, 107484, 126564, 134524, 137111, 201786, 274222, 403572, 411333, 548444, 822666, 1645332, 1782443, 3564886, 5347329, 7129772, 10694658, 21389316]

約数ペア:

[(1, 21389316), (2, 10694658), (3, 7129772), (4, 5347329), (6, 3564886), (12, 1782443), (13, 1645332), (26, 822666), (39, 548444), (52, 411333), (53, 403572), (78, 274222), (106, 201786), (156, 137111), (159, 134524), (169, 126564), (199, 107484), (212, 100893), (318, 67262), (338, 63282), (398, 53742), (507, 42188), (597, 35828), (636, 33631), (676, 31641), (689, 31044), (796, 26871), (1014, 21094), (1194, 17914), (1378, 15522), (2028, 10547), (2067, 10348), (2388, 8957), (2587, 8268), (2756, 7761), (4134, 5174)]