81435915

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:146

約数の個数: 128

約数和(自身を含む): 171417600

約数和(自身を除く): 89981685

約数列:

[1, 3, 5, 9, 11, 15, 27, 29, 31, 33, 45, 55, 61, 87, 93, 99, 135, 145, 155, 165, 183, 261, 279, 297, 305, 319, 341, 435, 465, 495, 549, 671, 783, 837, 899, 915, 957, 1023, 1305, 1395, 1485, 1595, 1647, 1705, 1769, 1891, 2013, 2697, 2745, 2871, 3069, 3355, 3915, 4185, 4495, 4785, 5115, 5307, 5673, 6039, 8091, 8235, 8613, 8845, 9207, 9455, 9889, 10065, 13485, 14355, 15345, 15921, 17019, 18117, 19459, 20801, 24273, 26535, 28365, 29667, 30195, 40455, 43065, 46035, 47763, 49445, 51057, 54839, 58377, 62403, 79605, 85095, 89001, 90585, 97295, 104005, 121365, 148335, 164517, 175131, 187209, 238815, 255285, 267003, 274195, 291885, 312015, 445005, 493551, 525393, 561627, 603229, 822585, 875655, 936045, 1335015, 1480653, 1809687, 2467755, 2626965, 2808135, 3016145, 5429061, 7403265, 9048435, 16287183, 27145305, 81435915]

約数ペア:

[(1, 81435915), (3, 27145305), (5, 16287183), (9, 9048435), (11, 7403265), (15, 5429061), (27, 3016145), (29, 2808135), (31, 2626965), (33, 2467755), (45, 1809687), (55, 1480653), (61, 1335015), (87, 936045), (93, 875655), (99, 822585), (135, 603229), (145, 561627), (155, 525393), (165, 493551), (183, 445005), (261, 312015), (279, 291885), (297, 274195), (305, 267003), (319, 255285), (341, 238815), (435, 187209), (465, 175131), (495, 164517), (549, 148335), (671, 121365), (783, 104005), (837, 97295), (899, 90585), (915, 89001), (957, 85095), (1023, 79605), (1305, 62403), (1395, 58377), (1485, 54839), (1595, 51057), (1647, 49445), (1705, 47763), (1769, 46035), (1891, 43065), (2013, 40455), (2697, 30195), (2745, 29667), (2871, 28365), (3069, 26535), (3355, 24273), (3915, 20801), (4185, 19459), (4495, 18117), (4785, 17019), (5115, 15921), (5307, 15345), (5673, 14355), (6039, 13485), (8091, 10065), (8235, 9889), (8613, 9455), (8845, 9207)]