21507952

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{773}}^1$

素因数の和:865

約数の個数: 40

約数和(自身を含む): 43765056

約数和(自身を除く): 22257104

約数列:

[1, 2, 4, 8, 16, 37, 47, 74, 94, 148, 188, 296, 376, 592, 752, 773, 1546, 1739, 3092, 3478, 6184, 6956, 12368, 13912, 27824, 28601, 36331, 57202, 72662, 114404, 145324, 228808, 290648, 457616, 581296, 1344247, 2688494, 5376988, 10753976, 21507952]

約数ペア:

[(1, 21507952), (2, 10753976), (4, 5376988), (8, 2688494), (16, 1344247), (37, 581296), (47, 457616), (74, 290648), (94, 228808), (148, 145324), (188, 114404), (296, 72662), (376, 57202), (592, 36331), (752, 28601), (773, 27824), (1546, 13912), (1739, 12368), (3092, 6956), (3478, 6184)]