127988860

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1\times {\mathrm{521}}^1$

素因数の和:774

約数の個数: 48

約数和(自身を含む): 274663872

約数和(自身を除く): 146675012

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 173, 284, 346, 355, 521, 692, 710, 865, 1042, 1420, 1730, 2084, 2605, 3460, 5210, 10420, 12283, 24566, 36991, 49132, 61415, 73982, 90133, 122830, 147964, 180266, 184955, 245660, 360532, 369910, 450665, 739820, 901330, 1802660, 6399443, 12798886, 25597772, 31997215, 63994430, 127988860]

約数ペア:

[(1, 127988860), (2, 63994430), (4, 31997215), (5, 25597772), (10, 12798886), (20, 6399443), (71, 1802660), (142, 901330), (173, 739820), (284, 450665), (346, 369910), (355, 360532), (521, 245660), (692, 184955), (710, 180266), (865, 147964), (1042, 122830), (1420, 90133), (1730, 73982), (2084, 61415), (2605, 49132), (3460, 36991), (5210, 24566), (10420, 12283)]