18634820

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:165

約数の個数: 72

約数和(自身を含む): 43205400

約数和(自身を除く): 24570580

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 89, 95, 116, 145, 178, 190, 290, 356, 361, 380, 445, 551, 580, 722, 890, 1102, 1444, 1691, 1780, 1805, 2204, 2581, 2755, 3382, 3610, 5162, 5510, 6764, 7220, 8455, 10324, 10469, 11020, 12905, 16910, 20938, 25810, 32129, 33820, 41876, 49039, 51620, 52345, 64258, 98078, 104690, 128516, 160645, 196156, 209380, 245195, 321290, 490390, 642580, 931741, 980780, 1863482, 3726964, 4658705, 9317410, 18634820]

約数ペア:

[(1, 18634820), (2, 9317410), (4, 4658705), (5, 3726964), (10, 1863482), (19, 980780), (20, 931741), (29, 642580), (38, 490390), (58, 321290), (76, 245195), (89, 209380), (95, 196156), (116, 160645), (145, 128516), (178, 104690), (190, 98078), (290, 64258), (356, 52345), (361, 51620), (380, 49039), (445, 41876), (551, 33820), (580, 32129), (722, 25810), (890, 20938), (1102, 16910), (1444, 12905), (1691, 11020), (1780, 10469), (1805, 10324), (2204, 8455), (2581, 7220), (2755, 6764), (3382, 5510), (3610, 5162)]