21653289

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{101}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 37425024

約数和(自身を除く): 15771735

約数列:

[1, 3, 7, 9, 21, 41, 63, 83, 101, 123, 249, 287, 303, 369, 581, 707, 747, 861, 909, 1743, 2121, 2583, 3403, 4141, 5229, 6363, 8383, 10209, 12423, 23821, 25149, 28987, 30627, 37269, 58681, 71463, 75447, 86961, 176043, 214389, 260883, 343703, 528129, 1031109, 2405921, 3093327, 7217763, 21653289]

約数ペア:

[(1, 21653289), (3, 7217763), (7, 3093327), (9, 2405921), (21, 1031109), (41, 528129), (63, 343703), (83, 260883), (101, 214389), (123, 176043), (249, 86961), (287, 75447), (303, 71463), (369, 58681), (581, 37269), (707, 30627), (747, 28987), (861, 25149), (909, 23821), (1743, 12423), (2121, 10209), (2583, 8383), (3403, 6363), (4141, 5229)]