21003654

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{199}}^1\times {\mathrm{359}}^1$

素因数の和:577

約数の個数: 48

約数和(自身を含む): 49248000

約数和(自身を除く): 28244346

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 199, 294, 359, 398, 597, 718, 1077, 1194, 1393, 2154, 2513, 2786, 4179, 5026, 7539, 8358, 9751, 15078, 17591, 19502, 29253, 35182, 52773, 58506, 71441, 105546, 142882, 214323, 428646, 500087, 1000174, 1500261, 3000522, 3500609, 7001218, 10501827, 21003654]

約数ペア:

[(1, 21003654), (2, 10501827), (3, 7001218), (6, 3500609), (7, 3000522), (14, 1500261), (21, 1000174), (42, 500087), (49, 428646), (98, 214323), (147, 142882), (199, 105546), (294, 71441), (359, 58506), (398, 52773), (597, 35182), (718, 29253), (1077, 19502), (1194, 17591), (1393, 15078), (2154, 9751), (2513, 8358), (2786, 7539), (4179, 5026)]