21166665

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:266

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18750135

約数列:

[1, 3, 5, 13, 15, 19, 29, 39, 57, 65, 87, 95, 145, 195, 197, 247, 285, 377, 435, 551, 591, 741, 985, 1131, 1235, 1653, 1885, 2561, 2755, 2955, 3705, 3743, 5655, 5713, 7163, 7683, 8265, 11229, 12805, 17139, 18715, 21489, 28565, 35815, 38415, 48659, 56145, 74269, 85695, 107445, 108547, 145977, 222807, 243295, 325641, 371345, 542735, 729885, 1114035, 1411111, 1628205, 4233333, 7055555, 21166665]

約数ペア:

[(1, 21166665), (3, 7055555), (5, 4233333), (13, 1628205), (15, 1411111), (19, 1114035), (29, 729885), (39, 542735), (57, 371345), (65, 325641), (87, 243295), (95, 222807), (145, 145977), (195, 108547), (197, 107445), (247, 85695), (285, 74269), (377, 56145), (435, 48659), (551, 38415), (591, 35815), (741, 28565), (985, 21489), (1131, 18715), (1235, 17139), (1653, 12805), (1885, 11229), (2561, 8265), (2755, 7683), (2955, 7163), (3705, 5713), (3743, 5655)]