21015768

素因数分解:

$2^3\times 3^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{601}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 55480320

約数和(自身を除く): 34464552

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 31, 47, 62, 93, 94, 124, 141, 186, 188, 248, 282, 372, 376, 564, 601, 744, 1128, 1202, 1457, 1803, 2404, 2914, 3606, 4371, 4808, 5828, 7212, 8742, 11656, 14424, 17484, 18631, 28247, 34968, 37262, 55893, 56494, 74524, 84741, 111786, 112988, 149048, 169482, 223572, 225976, 338964, 447144, 677928, 875657, 1751314, 2626971, 3502628, 5253942, 7005256, 10507884, 21015768]

約数ペア:

[(1, 21015768), (2, 10507884), (3, 7005256), (4, 5253942), (6, 3502628), (8, 2626971), (12, 1751314), (24, 875657), (31, 677928), (47, 447144), (62, 338964), (93, 225976), (94, 223572), (124, 169482), (141, 149048), (186, 112988), (188, 111786), (248, 84741), (282, 74524), (372, 56494), (376, 55893), (564, 37262), (601, 34968), (744, 28247), (1128, 18631), (1202, 17484), (1457, 14424), (1803, 11656), (2404, 8742), (2914, 7212), (3606, 5828), (4371, 4808)]