18661120

素因数分解:

$2^8\times 5^1\times {\mathrm{61}}^1\times {\mathrm{239}}^1$

素因数の和:321

約数の個数: 72

約数和(自身を含む): 45622080

約数和(自身を除く): 26960960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 239, 244, 256, 305, 320, 478, 488, 610, 640, 956, 976, 1195, 1220, 1280, 1912, 1952, 2390, 2440, 3824, 3904, 4780, 4880, 7648, 7808, 9560, 9760, 14579, 15296, 15616, 19120, 19520, 29158, 30592, 38240, 39040, 58316, 61184, 72895, 76480, 78080, 116632, 145790, 152960, 233264, 291580, 305920, 466528, 583160, 933056, 1166320, 1866112, 2332640, 3732224, 4665280, 9330560, 18661120]

約数ペア:

[(1, 18661120), (2, 9330560), (4, 4665280), (5, 3732224), (8, 2332640), (10, 1866112), (16, 1166320), (20, 933056), (32, 583160), (40, 466528), (61, 305920), (64, 291580), (80, 233264), (122, 152960), (128, 145790), (160, 116632), (239, 78080), (244, 76480), (256, 72895), (305, 61184), (320, 58316), (478, 39040), (488, 38240), (610, 30592), (640, 29158), (956, 19520), (976, 19120), (1195, 15616), (1220, 15296), (1280, 14579), (1912, 9760), (1952, 9560), (2390, 7808), (2440, 7648), (3824, 4880), (3904, 4780)]