19949120

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2011}}^1$

素因数の和:2059

約数の個数: 56

約数和(自身を含む): 49060608

約数和(自身を除く): 29111488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2011, 2480, 4022, 4960, 8044, 9920, 10055, 16088, 20110, 32176, 40220, 62341, 64352, 80440, 124682, 128704, 160880, 249364, 311705, 321760, 498728, 623410, 643520, 997456, 1246820, 1994912, 2493640, 3989824, 4987280, 9974560, 19949120]

約数ペア:

[(1, 19949120), (2, 9974560), (4, 4987280), (5, 3989824), (8, 2493640), (10, 1994912), (16, 1246820), (20, 997456), (31, 643520), (32, 623410), (40, 498728), (62, 321760), (64, 311705), (80, 249364), (124, 160880), (155, 128704), (160, 124682), (248, 80440), (310, 64352), (320, 62341), (496, 40220), (620, 32176), (992, 20110), (1240, 16088), (1984, 10055), (2011, 9920), (2480, 8044), (4022, 4960)]