81379840

素因数分解:

$2^9\times 5^1\times {\mathrm{83}}^1\times {\mathrm{383}}^1$

素因数の和:489

約数の個数: 80

約数和(自身を含む): 197987328

約数和(自身を除く): 116607488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 83, 128, 160, 166, 256, 320, 332, 383, 415, 512, 640, 664, 766, 830, 1280, 1328, 1532, 1660, 1915, 2560, 2656, 3064, 3320, 3830, 5312, 6128, 6640, 7660, 10624, 12256, 13280, 15320, 21248, 24512, 26560, 30640, 31789, 42496, 49024, 53120, 61280, 63578, 98048, 106240, 122560, 127156, 158945, 196096, 212480, 245120, 254312, 317890, 490240, 508624, 635780, 980480, 1017248, 1271560, 2034496, 2543120, 4068992, 5086240, 8137984, 10172480, 16275968, 20344960, 40689920, 81379840]

約数ペア:

[(1, 81379840), (2, 40689920), (4, 20344960), (5, 16275968), (8, 10172480), (10, 8137984), (16, 5086240), (20, 4068992), (32, 2543120), (40, 2034496), (64, 1271560), (80, 1017248), (83, 980480), (128, 635780), (160, 508624), (166, 490240), (256, 317890), (320, 254312), (332, 245120), (383, 212480), (415, 196096), (512, 158945), (640, 127156), (664, 122560), (766, 106240), (830, 98048), (1280, 63578), (1328, 61280), (1532, 53120), (1660, 49024), (1915, 42496), (2560, 31789), (2656, 30640), (3064, 26560), (3320, 24512), (3830, 21248), (5312, 15320), (6128, 13280), (6640, 12256), (7660, 10624)]