21405944

素因数分解:

$2^3\times 7^3\times {\mathrm{29}}^1\times {\mathrm{269}}^1$

素因数の和:325

約数の個数: 64

約数和(自身を含む): 48600000

約数和(自身を除く): 27194056

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 49, 56, 58, 98, 116, 196, 203, 232, 269, 343, 392, 406, 538, 686, 812, 1076, 1372, 1421, 1624, 1883, 2152, 2744, 2842, 3766, 5684, 7532, 7801, 9947, 11368, 13181, 15064, 15602, 19894, 26362, 31204, 39788, 52724, 54607, 62408, 79576, 92267, 105448, 109214, 184534, 218428, 369068, 382249, 436856, 738136, 764498, 1528996, 2675743, 3057992, 5351486, 10702972, 21405944]

約数ペア:

[(1, 21405944), (2, 10702972), (4, 5351486), (7, 3057992), (8, 2675743), (14, 1528996), (28, 764498), (29, 738136), (49, 436856), (56, 382249), (58, 369068), (98, 218428), (116, 184534), (196, 109214), (203, 105448), (232, 92267), (269, 79576), (343, 62408), (392, 54607), (406, 52724), (538, 39788), (686, 31204), (812, 26362), (1076, 19894), (1372, 15602), (1421, 15064), (1624, 13181), (1883, 11368), (2152, 9947), (2744, 7801), (2842, 7532), (3766, 5684)]