21940480

素因数分解:

$2^8\times 5^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:363

約数の個数: 72

約数和(自身を含む): 53605944

約数和(自身を除く): 31665464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 256, 281, 305, 320, 488, 562, 610, 640, 976, 1124, 1220, 1280, 1405, 1952, 2248, 2440, 2810, 3904, 4496, 4880, 5620, 7808, 8992, 9760, 11240, 15616, 17141, 17984, 19520, 22480, 34282, 35968, 39040, 44960, 68564, 71936, 78080, 85705, 89920, 137128, 171410, 179840, 274256, 342820, 359680, 548512, 685640, 1097024, 1371280, 2194048, 2742560, 4388096, 5485120, 10970240, 21940480]

約数ペア:

[(1, 21940480), (2, 10970240), (4, 5485120), (5, 4388096), (8, 2742560), (10, 2194048), (16, 1371280), (20, 1097024), (32, 685640), (40, 548512), (61, 359680), (64, 342820), (80, 274256), (122, 179840), (128, 171410), (160, 137128), (244, 89920), (256, 85705), (281, 78080), (305, 71936), (320, 68564), (488, 44960), (562, 39040), (610, 35968), (640, 34282), (976, 22480), (1124, 19520), (1220, 17984), (1280, 17141), (1405, 15616), (1952, 11240), (2248, 9760), (2440, 8992), (2810, 7808), (3904, 5620), (4496, 4880)]