21489105

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1$

素因数の和:246

約数の個数: 64

約数和(自身を含む): 40808448

約数和(自身を除く): 19319343

約数列:

[1, 3, 5, 11, 15, 17, 33, 47, 51, 55, 85, 141, 163, 165, 187, 235, 255, 489, 517, 561, 705, 799, 815, 935, 1551, 1793, 2397, 2445, 2585, 2771, 2805, 3995, 5379, 7661, 7755, 8313, 8789, 8965, 11985, 13855, 22983, 26367, 26895, 30481, 38305, 41565, 43945, 84271, 91443, 114915, 130237, 131835, 152405, 252813, 390711, 421355, 457215, 651185, 1264065, 1432607, 1953555, 4297821, 7163035, 21489105]

約数ペア:

[(1, 21489105), (3, 7163035), (5, 4297821), (11, 1953555), (15, 1432607), (17, 1264065), (33, 651185), (47, 457215), (51, 421355), (55, 390711), (85, 252813), (141, 152405), (163, 131835), (165, 130237), (187, 114915), (235, 91443), (255, 84271), (489, 43945), (517, 41565), (561, 38305), (705, 30481), (799, 26895), (815, 26367), (935, 22983), (1551, 13855), (1793, 11985), (2397, 8965), (2445, 8789), (2585, 8313), (2771, 7755), (2805, 7661), (3995, 5379)]