20405328896

素因数分解:

$2^{10}\times {\mathrm{31}}^1\times {\mathrm{642809}}^1$

素因数の和:642860

約数の個数: 44

約数和(自身を含む): 42106626240

約数和(自身を除く): 21701297344

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 496, 512, 992, 1024, 1984, 3968, 7936, 15872, 31744, 642809, 1285618, 2571236, 5142472, 10284944, 19927079, 20569888, 39854158, 41139776, 79708316, 82279552, 159416632, 164559104, 318833264, 329118208, 637666528, 658236416, 1275333056, 2550666112, 5101332224, 10202664448, 20405328896]

約数ペア:

[(1, 20405328896), (2, 10202664448), (4, 5101332224), (8, 2550666112), (16, 1275333056), (31, 658236416), (32, 637666528), (62, 329118208), (64, 318833264), (124, 164559104), (128, 159416632), (248, 82279552), (256, 79708316), (496, 41139776), (512, 39854158), (992, 20569888), (1024, 19927079), (1984, 10284944), (3968, 5142472), (7936, 2571236), (15872, 1285618), (31744, 642809)]