21387660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50923}}^1$

素因数の和:50942

約数の個数: 48

約数和(自身を含む): 68441856

約数和(自身を除く): 47054196

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 50923, 101846, 152769, 203692, 254615, 305538, 356461, 509230, 611076, 712922, 763845, 1018460, 1069383, 1425844, 1527690, 1782305, 2138766, 3055380, 3564610, 4277532, 5346915, 7129220, 10693830, 21387660]

約数ペア:

[(1, 21387660), (2, 10693830), (3, 7129220), (4, 5346915), (5, 4277532), (6, 3564610), (7, 3055380), (10, 2138766), (12, 1782305), (14, 1527690), (15, 1425844), (20, 1069383), (21, 1018460), (28, 763845), (30, 712922), (35, 611076), (42, 509230), (60, 356461), (70, 305538), (84, 254615), (105, 203692), (140, 152769), (210, 101846), (420, 50923)]