18942980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{269}}^1\times {\mathrm{503}}^1$

素因数の和:788

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 26779900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 269, 503, 538, 1006, 1076, 1345, 1883, 2012, 2515, 2690, 3521, 3766, 5030, 5380, 7042, 7532, 9415, 10060, 14084, 17605, 18830, 35210, 37660, 70420, 135307, 270614, 541228, 676535, 947149, 1353070, 1894298, 2706140, 3788596, 4735745, 9471490, 18942980]

約数ペア:

[(1, 18942980), (2, 9471490), (4, 4735745), (5, 3788596), (7, 2706140), (10, 1894298), (14, 1353070), (20, 947149), (28, 676535), (35, 541228), (70, 270614), (140, 135307), (269, 70420), (503, 37660), (538, 35210), (1006, 18830), (1076, 17605), (1345, 14084), (1883, 10060), (2012, 9415), (2515, 7532), (2690, 7042), (3521, 5380), (3766, 5030)]