20730657280

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{261223}}^1$

素因数の和:261277

約数の個数: 80

約数和(自身を含む): 51308573184

約数和(自身を除く): 30577915904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1240, 1280, 1984, 2480, 2560, 3968, 4960, 7936, 9920, 15872, 19840, 39680, 79360, 261223, 522446, 1044892, 1306115, 2089784, 2612230, 4179568, 5224460, 8097913, 8359136, 10448920, 16195826, 16718272, 20897840, 32391652, 33436544, 40489565, 41795680, 64783304, 66873088, 80979130, 83591360, 129566608, 133746176, 161958260, 167182720, 259133216, 323916520, 334365440, 518266432, 647833040, 668730880, 1036532864, 1295666080, 2073065728, 2591332160, 4146131456, 5182664320, 10365328640, 20730657280]

約数ペア:

[(1, 20730657280), (2, 10365328640), (4, 5182664320), (5, 4146131456), (8, 2591332160), (10, 2073065728), (16, 1295666080), (20, 1036532864), (31, 668730880), (32, 647833040), (40, 518266432), (62, 334365440), (64, 323916520), (80, 259133216), (124, 167182720), (128, 161958260), (155, 133746176), (160, 129566608), (248, 83591360), (256, 80979130), (310, 66873088), (320, 64783304), (496, 41795680), (512, 40489565), (620, 33436544), (640, 32391652), (992, 20897840), (1240, 16718272), (1280, 16195826), (1984, 10448920), (2480, 8359136), (2560, 8097913), (3968, 5224460), (4960, 4179568), (7936, 2612230), (9920, 2089784), (15872, 1306115), (19840, 1044892), (39680, 522446), (79360, 261223)]