21991396

素因数分解:

$2^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:173

約数の個数: 72

約数和(自身を含む): 47832120

約数和(自身を除く): 25840724

約数列:

[1, 2, 4, 7, 14, 28, 29, 49, 53, 58, 73, 98, 106, 116, 146, 196, 203, 212, 292, 371, 406, 511, 742, 812, 1022, 1421, 1484, 1537, 2044, 2117, 2597, 2842, 3074, 3577, 3869, 4234, 5194, 5684, 6148, 7154, 7738, 8468, 10388, 10759, 14308, 14819, 15476, 21518, 27083, 29638, 43036, 54166, 59276, 75313, 103733, 108332, 112201, 150626, 189581, 207466, 224402, 301252, 379162, 414932, 448804, 758324, 785407, 1570814, 3141628, 5497849, 10995698, 21991396]

約数ペア:

[(1, 21991396), (2, 10995698), (4, 5497849), (7, 3141628), (14, 1570814), (28, 785407), (29, 758324), (49, 448804), (53, 414932), (58, 379162), (73, 301252), (98, 224402), (106, 207466), (116, 189581), (146, 150626), (196, 112201), (203, 108332), (212, 103733), (292, 75313), (371, 59276), (406, 54166), (511, 43036), (742, 29638), (812, 27083), (1022, 21518), (1421, 15476), (1484, 14819), (1537, 14308), (2044, 10759), (2117, 10388), (2597, 8468), (2842, 7738), (3074, 7154), (3577, 6148), (3869, 5684), (4234, 5194)]